/*
 * ***** BEGIN GPL LICENSE BLOCK *****
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * Contributor(s): Blender Foundation (2008).
 *
 * ***** END GPL LICENSE BLOCK *****
 */

/** \file blender/makesrna/intern/rna_rna.c
 *  \ingroup RNA
 */

#include <stdlib.h>

#include "DNA_ID.h"

#include "BLI_utildefines.h"

#include "RNA_access.h"
#include "RNA_define.h"
#include "RNA_enum_types.h"

#include "rna_internal.h"

/* -------------------------------------------------------------------- */
/** \name Generic Enum's
 * \{ */

/* Reuse for dynamic types  */
const EnumPropertyItem DummyRNA_NULL_items[] = {
	{0, NULL, 0, NULL, NULL}
};

/* Reuse for dynamic types with default value */
const EnumPropertyItem DummyRNA_DEFAULT_items[] = {
	{0, "DEFAULT", 0, "Default", ""},
	{0, NULL, 0, NULL, NULL}
};

/** \} */

/* -------------------------------------------------------------------- */
/** \name RNA Enum's
 * \{ */


const EnumPropertyItem rna_enum_property_type_items[] = {
	{PROP_BOOLEAN, "BOOLEAN", 0, "Boolean", ""},
	{PROP_INT, "INT", 0, "Integer", ""},
	{PROP_FLOAT, "FLOAT", 0, "Float", ""},
	{PROP_STRING, "STRING", 0, "String", ""},
	{PROP_ENUM, "ENUM", 0, "Enumeration", ""},
	{PROP_POINTER, "POINTER", 0, "Pointer", ""},
	{PROP_COLLECTION, "COLLECTION", 0, "Collection", ""},
	{0, NULL, 0, NULL, NULL}
};

/* XXX Keep in sync with bpy_props.c's property_subtype_xxx_items ???
 *     Currently it is not...
 */
const EnumPropertyItem rna_enum_property_subtype_items[] = {
	{PROP_NONE, "NONE", 0, "None", ""},

	/* strings */
	{PROP_FILEPATH, "FILEPATH", 0, "File Path", ""},
	{PROP_DIRPATH, "DIRPATH", 0, "Directory Path", ""},
	{PROP_FILENAME, "FILENAME", 0, "File Name", ""},
	{PROP_PASSWORD, "PASSWORD", 0, "Password", "A string that is displayed hidden ('********')"},

	/* numbers */
	{PROP_PIXEL, "PIXEL", 0, "Pixel", ""},
	{PROP_UNSIGNED, "UNSIGNED", 0, "Unsigned", ""},
	{PROP_PERCENTAGE, "PERCENTAGE", 0, "Percentage", ""},
	{PROP_FACTOR, "FACTOR", 0, "Factor", ""},
	{PROP_ANGLE, "ANGLE", 0, "Angle", ""},
	{PROP_TIME, "TIME", 0, "Time", ""},
	{PROP_DISTANCE, "DISTANCE", 0, "Distance", ""},
	{PROP_DISTANCE_CAMERA, "DISTANCE_CAMERA", 0, "Camera Distance", ""},

	/* number arrays */
	{PROP_COLOR, "COLOR", 0, "Color", ""},
	{PROP_TRANSLATION, "TRANSLATION", 0, "Translation", ""},
	{PROP_DIRECTION, "DIRECTION", 0, "Direction", ""},
	{PROP_VELOCITY, "VELOCITY", 0, "Velocity", ""},
	{PROP_ACCELERATION, "ACCELERATION", 0, "Acceleration", ""},
	{PROP_MATRIX, "MATRIX", 0, "Matrix", ""},
	{PROP_EULER, "EULER", 0, "Euler Angles", ""},
	{PROP_QUATERNION, "QUATERNION", 0, "Quaternion", ""},
	{PROP_AXISANGLE, "AXISANGLE", 0, "Axis-Angle", ""},
	{PROP_XYZ, "XYZ", 0, "XYZ", ""},
	{PROP_XYZ_LENGTH, "XYZ_LENGTH", 0, "XYZ Length", ""},
	{PROP_COLOR_GAMMA, "COLOR_GAMMA", 0, "Color", ""},
	{PROP_COORDS, "COORDS", 0, "Coordinates", ""},

	/* booleans */
	{PROP_LAYER, "LAYER", 0, "Layer", ""},
	{PROP_LAYER_MEMBER, "LAYER_MEMBER", 0, "Layer Member", ""},
	{0, NULL, 0, NULL, NULL}
};

const EnumPropertyItem rna_enum_property_unit_items[] = {
	{PROP_UNIT_NONE, "NONE", 0, "None", ""},
	{PROP_UNIT_LENGTH, "LENGTH", 0, "Length", ""},
	{PROP_UNIT_AREA, "AREA", 0, "Area", ""},
	{PROP_UNIT_VOLUME, "VOLUME", 0, "Volume", ""},
	{PROP_UNIT_ROTATION, "ROTATION", 0, "Rotation", ""},
	{PROP_UNIT_TIME, "TIME", 0, "Time", ""},
	{PROP_UNIT_VELOCITY, "VELOCITY", 0, "Velocity", ""},
	{PROP_UNIT_ACCELERATION, "ACCELERATION", 0, "Acceleration", ""},
	{PROP_UNIT_MASS, "MASS", 0, "Mass", ""},
	{PROP_UNIT_CAMERA, "CAMERA", 0, "Camera", ""},
	{0, NULL, 0, NULL, NULL}
};

/** \} */

#ifdef RNA_RUNTIME
#include "MEM_guardedalloc.h"
#include "BLI_ghash.h"
#include "BLI_string.h"

#include "BKE_library_override.h"

/* Struct */

static void rna_Struct_identifier_get(PointerRNA *ptr, char *value)
{
	strcpy(value, ((StructRNA *)ptr->data)->identifier);
}

static int rna_Struct_identifier_length(PointerRNA *ptr)
{
	return strlen(((StructRNA *)ptr->data)->identifier);
}

static void rna_Struct_description_get(PointerRNA *ptr, char *value)
{
	strcpy(value, ((StructRNA *)ptr->data)->description);
}

static int rna_Struct_description_length(PointerRNA *ptr)
{
	return strlen(((StructRNA *)ptr->data)->description);
}

static void rna_Struct_name_get(PointerRNA *ptr, char *value)
{
	strcpy(value, ((StructRNA *)ptr->data)->name);
}

static int rna_Struct_name_length(PointerRNA *ptr)
{
	return strlen(((StructRNA *)ptr->data)->name);
}

static void rna_Struct_translation_context_get(PointerRNA *ptr, char *value)
{
	strcpy(value, ((StructRNA *)ptr->data)->translation_context);
}

static int rna_Struct_translation_context_length(PointerRNA *ptr)
{
	return strlen(((StructRNA *)ptr->data)->translation_context);
}

static PointerRNA rna_Struct_base_get(PointerRNA *ptr)
{
	return rna_pointer_inherit_refine(ptr, &RNA_Struct, ((StructRNA *)ptr->data)->base);
}

static PointerRNA rna_Struct_nested_get(PointerRNA *ptr)
{
	return rna_pointer_inherit_refine(ptr, &RNA_Struct, ((StructRNA *)ptr->data)->nested);
}

static PointerRNA rna_Struct_name_property_get(PointerRNA *ptr)
{
	return rna_pointer_inherit_refine(ptr, &RNA_Property, ((StructRNA *)ptr->data)->nameproperty);
}

/* Struct property iteration. This is quite complicated, the purpose is to
 * iterate over properties of all inheritance levels, and for each struct to
 * also iterator over id properties not known by RNA. */

static int rna_idproperty_known(CollectionPropertyIterator *iter, void *data)
{
	IDProperty *idprop = (IDProperty *)data;
	PropertyRNA *prop;
	StructRNA *ptype = iter->builtin_parent.type;

	/* function to skip any id properties that are already known by RNA,
	 * for the second loop where we go over unknown id properties */
	do {
		for (prop = ptype->cont.properties.first; prop; prop = prop->next)
			if ((prop->flag_internal & PROP_INTERN_BUILTIN) == 0 && STREQ(prop->identifier, idprop->name))
				return 1;
	} while ((ptype = ptype->base));

	return 0;
}

static int rna_property_builtin(CollectionPropertyIterator *UNUSED(iter), void *data)
{
	PropertyRNA *prop = (PropertyRNA *)data;

	/* function to skip builtin rna properties */

	return (prop->flag_internal & PROP_INTERN_BUILTIN);
}

static int rna_function_builtin(CollectionPropertyIterator *UNUSED(iter), void *data)
{
	FunctionRNA *func = (FunctionRNA *)data;

	/* function to skip builtin rna functions */

	return (func->flag & FUNC_BUILTIN);
}

static void rna_inheritance_next_level_restart(CollectionPropertyIterator *iter, IteratorSkipFunc skip, int funcs)
{
	/* RNA struct inheritance */
	while (!iter->valid && iter->level > 0) {
		StructRNA *srna;
		int i;

		srna = (StructRNA *)iter->parent.data;
		iter->level--;
		for (i = iter->level; i > 0; i--)
			srna = srna->base;

		rna_iterator_listbase_end(iter);

		if (funcs)
			rna_iterator_listbase_begin(iter, &srna->functions, skip);
		else
			rna_iterator_listbase_begin(iter, &srna->cont.properties, skip);
	}
}

static void rna_inheritance_properties_listbase_begin(CollectionPropertyIterator *iter, ListBase *lb,
                                                      IteratorSkipFunc skip)
{
	rna_iterator_listbase_begin(iter, lb, skip);
	rna_inheritance_next_level_restart(iter, skip, 0);
}

static void rna_inheritance_properties_listbase_next(CollectionPropertyIterator *iter, IteratorSkipFunc skip)
{
	rna_iterator_listbase_next(iter);
	rna_inheritance_next_level_restart(iter, skip, 0);
}

static void rna_inheritance_functions_listbase_begin(CollectionPropertyIterator *iter, ListBase *lb,
                                                     IteratorSkipFunc skip)
{
	rna_iterator_listbase_begin(iter, lb, skip);
	rna_inheritance_next_level_restart(iter, skip, 1);
}

static void rna_inheritance_functions_listbase_next(CollectionPropertyIterator *iter, IteratorSkipFunc skip)
{
	rna_iterator_listbase_next(iter);
	rna_inheritance_next_level_restart(iter, skip, 1);
}

static void rna_Struct_properties_next(CollectionPropertyIterator *iter)
{
	ListBaseIterator *internal = &iter->internal.listbase;
	IDProperty *group;

	if (internal->flag) {
		/* id properties */
		rna_iterator_listbase_next(iter);
	}
	else {
		/* regular properties */
		rna_inheritance_properties_listbase_next(iter, rna_property_builtin);

		/* try id properties */
		if (!iter->valid) {
			group = RNA_struct_idprops(&iter->builtin_parent, 0);

			if (group) {
				rna_iterator_listbase_end(iter);
				rna_iterator_listbase_begin(iter, &group->data.group, rna_idproperty_known);
				internal = &iter->internal.listbase;
				internal->flag = 1;
			}
		}
	}
}

static void rna_Struct_properties_begin(CollectionPropertyIterator *iter, PointerRNA *ptr)
{
	StructRNA *srna;

	/* here ptr->data should always be the same as iter->parent.type */
	srna = (StructRNA *)ptr->data;

	while (srna->base) {
		iter->level++;
		srna = srna->base;
	}

	rna_inheritance_properties_listbase_begin(iter, &srna->cont.properties, rna_property_builtin);
}

static PointerRNA rna_Struct_properties_get(CollectionPropertyIterator *iter)
{
	ListBaseIterator *internal = &iter->internal.listbase;

	/* we return either PropertyRNA* or IDProperty*, the rna_access.c
	 * functions can handle both as PropertyRNA* with some tricks */
	return rna_pointer_inherit_refine(&iter->parent, &RNA_Property, internal->link);
}

static void rna_Struct_functions_next(CollectionPropertyIterator *iter)
{
	rna_inheritance_functions_listbase_next(iter, rna_function_builtin);
}

static void rna_Struct_functions_begin(CollectionPropertyIterator *iter, PointerRNA *ptr)
{
	StructRNA *srna;

	/* here ptr->data should always be the same as iter->parent.type */
	srna = (StructRNA *)ptr->data;

	while (srna->base) {
		iter->level++;
		srna = srna->base;
	}

	rna_inheritance_functions_listbase_begin(iter, &srna->functions, rna_function_builtin);
}

static PointerRNA rna_Struct_functions_get(CollectionPropertyIterator *iter)
{
	ListBaseIterator *internal = &iter->internal.listbase;

	/* we return either PropertyRNA* or IDProperty*, the rna_access.c
	 * functions can handle both as PropertyRNA* with some tricks */
	return rna_pointer_inherit_refine(&iter->parent, &RNA_Function, internal->link);
}

static void rna_Struct_property_tags_begin(CollectionPropertyIterator *iter, PointerRNA *ptr)
{
	/* here ptr->data should always be the same as iter->parent.type */
	StructRNA *srna = (StructRNA *)ptr->data;
	const EnumPropertyItem *tag_defines = RNA_struct_property_tag_defines(srna);
	unsigned int tag_count = tag_defines ? RNA_enum_items_count(tag_defines) : 0;

	rna_iterator_array_begin(iter, (void *)tag_defines, sizeof(EnumPropertyItem), tag_count, 0, NULL);
}

/* Builtin properties iterator re-uses the Struct properties iterator, only
 * difference is that we need to set the ptr data to the type of the struct
 * whose properties we want to iterate over. */

void rna_builtin_properties_begin(CollectionPropertyIterator *iter, PointerRNA *ptr)
{
	PointerRNA newptr;

	/* we create a new pointer with the type as the data */
	newptr.type = &RNA_Struct;
	newptr.data = ptr->type;

	if (ptr->type->flag & STRUCT_ID)
		newptr.id.data = ptr->data;
	else
		newptr.id.data = NULL;

	iter->parent = newptr;
	iter->builtin_parent = *ptr;

	rna_Struct_properties_begin(iter, &newptr);
}

void rna_builtin_properties_next(CollectionPropertyIterator *iter)
{
	rna_Struct_properties_next(iter);
}

PointerRNA rna_builtin_properties_get(CollectionPropertyIterator *iter)
{
	return rna_Struct_properties_get(iter);
}

int rna_builtin_properties_lookup_string(PointerRNA *ptr, const char *key, PointerRNA *r_ptr)
{
	StructRNA *srna;
	PropertyRNA *prop;
	PointerRNA propptr = {{NULL}};

	srna = ptr->type;

	do {
		if (srna->cont.prophash) {
			prop = BLI_ghash_lookup(srna->cont.prophash, (void *)key);

			if (prop) {
				propptr.type = &RNA_Property;
				propptr.data = prop;

				*r_ptr = propptr;
				return true;
			}
		}
		else {
			for (prop = srna->cont.properties.first; prop; prop = prop->next) {
				if (!(prop->flag_internal & PROP_INTERN_BUILTIN) && STREQ(prop->identifier, key)) {
					propptr.type = &RNA_Property;
					propptr.data = prop;

					*r_ptr = propptr;
					return true;
				}
			}
		}
	} while ((srna = srna->base));

	/* this was used pre 2.5beta0, now ID property access uses python's
	 * getitem style access
	 * - ob["foo"] rather than ob.foo */
#if 0
	if (ptr->data) {
		IDProperty *group, *idp;

		group = RNA_struct_idprops(ptr, 0);

		if (group) {
			for (idp = group->data.group.first; idp; idp = idp->next) {
				if (STREQ(idp->name, key)) {
					propptr.type = &RNA_Property;
					propptr.data = idp;

					*r_ptr = propptr;
					return true;
				}
			}
		}
	}
#endif
	return false;
}

PointerRNA rna_builtin_type_get(PointerRNA *ptr)
{
	return rna_pointer_inherit_refine(ptr, &RNA_Struct, ptr->type);
}

/* Property */

static StructRNA *rna_Property_refine(PointerRNA *ptr)
{
	PropertyRNA *prop = (PropertyRNA *)ptr->data;

	rna_idproperty_check(&prop, ptr); /* XXX ptr? */

	switch (prop->type) {
		case PROP_BOOLEAN: return &RNA_BoolProperty;
		case PROP_INT: return &RNA_IntProperty;
		case PROP_FLOAT: return &RNA_FloatProperty;
		case PROP_STRING: return &RNA_StringProperty;
		case PROP_ENUM: return &RNA_EnumProperty;
		case PROP_POINTER: return &RNA_PointerProperty;
		case PROP_COLLECTION: return &RNA_CollectionProperty;
		default: return &RNA_Property;
	}
}

static void rna_Property_identifier_get(PointerRNA *ptr, char *value)
{
	PropertyRNA *prop = (PropertyRNA *)ptr->data;
	rna_idproperty_check(&prop, ptr);
	strcpy(value, ((PropertyRNA *)prop)->identifier);
}

static int rna_Property_identifier_length(PointerRNA *ptr)
{
	PropertyRNA *prop = (PropertyRNA *)ptr->data;
	rna_idproperty_check(&prop, ptr);
	return strlen(prop->identifier);
}

static void rna_Property_name_get(PointerRNA *ptr, char *value)
{
	PropertyRNA *prop = (PropertyRNA *)ptr->data;
	rna_idproperty_check(&prop, ptr);
	strcpy(value, prop->name ? prop->name : "");
}

static int rna_Property_name_length(PointerRNA *ptr)
{
	PropertyRNA *prop = (PropertyRNA *)ptr->data;
	rna_idproperty_check(&prop, ptr);
	return prop->name ? strlen(prop->name) : 0;
}

static void rna_Property_description_get(PointerRNA *ptr, char *value)
{
	PropertyRNA *prop = (PropertyRNA *)ptr->data;
	rna_idproperty_check(&prop, ptr);
	strcpy(value, prop->description ? prop->description : "");
}
static int rna_Property_description_length(PointerRNA *ptr)
{
	PropertyRNA *prop = (PropertyRNA *)ptr->data;
	rna_idproperty_check(&prop, ptr);
	return prop->description ? strlen(prop->description) : 0;
}

static void rna_Property_translation_context_get(PointerRNA *ptr, char *value)
{
	PropertyRNA *prop = (PropertyRNA *)ptr->data;
	rna_idproperty_check(&prop, ptr);
	strcpy(value, prop->translation_context);
}

static int rna_Property_translation_context_length(PointerRNA *ptr)
{
	PropertyRNA *prop = (PropertyRNA *)ptr->data;
	rna_idproperty_check(&prop, ptr);
	return strlen(prop->translation_context);
}

static int rna_Property_type_get(PointerRNA *ptr)
{
	PropertyRNA *prop = (PropertyRNA *)ptr->data;
	rna_idproperty_check(&prop, ptr);
	return prop->type;
}

static int rna_Property_subtype_get(PointerRNA *ptr)
{
	PropertyRNA *prop = (PropertyRNA *)ptr->data;
	rna_idproperty_check(&prop, ptr);
	return prop->subtype;
}

static PointerRNA rna_Property_srna_get(PointerRNA *ptr)
{
	PropertyRNA *prop = (PropertyRNA *)ptr->data;
	rna_idproperty_check(&prop, ptr);
	return rna_pointer_inherit_refine(ptr, &RNA_Struct, prop->srna);
}

static int rna_Property_unit_get(PointerRNA *ptr)
{
	PropertyRNA *prop = (PropertyRNA *)ptr->data;
	rna_idproperty_check(&prop, ptr);
	return RNA_SUBTYPE_UNIT(prop->subtype);
}

static int rna_Property_icon_get(PointerRNA *ptr)
{
	PropertyRNA *prop = (PropertyRNA *)ptr->data;
	rna_idproperty_check(&prop, ptr);
	return prop->icon;
}

static bool rna_Property_readonly_get(PointerRNA *ptr)
{
	PropertyRNA *prop = (PropertyRNA *)ptr->data;

	/* don't use this because it will call functions that check the internal
	 * data for introspection we only need to know if it can be edited so the
	 * flag is better for this */
/*	return RNA_property_editable(ptr, prop); */
	return (prop->flag & PROP_EDITABLE) == 0;
}

static bool rna_Property_animatable_get(PointerRNA *ptr)
{
	PropertyRNA *prop = (PropertyRNA *)ptr->data;

	return (prop->flag & PROP_ANIMATABLE) != 0;
}

static bool rna_Property_overridable_get(PointerRNA *ptr)
{
	PropertyRNA *prop = (PropertyRNA *)ptr->data;

	return (prop->flag_override & PROPOVERRIDE_OVERRIDABLE_STATIC) != 0;
}

static bool rna_Property_use_output_get(PointerRNA *ptr)
{
	PropertyRNA *prop = (PropertyRNA *)ptr->data;
	return (prop->flag_parameter & PARM_OUTPUT) != 0;
}

static bool rna_Property_is_required_get(PointerRNA *ptr)
{
	PropertyRNA *prop = (PropertyRNA *)ptr->data;
	return (prop->flag_parameter & PARM_REQUIRED) != 0;
}

static bool rna_Property_is_argument_optional_get(PointerRNA *ptr)
{
	PropertyRNA *prop = (PropertyRNA *)ptr->data;
	return (prop->flag_parameter & PARM_PYFUNC_OPTIONAL) != 0;
}

static bool rna_Property_is_never_none_get(PointerRNA *ptr)
{
	PropertyRNA *prop = (PropertyRNA *)ptr->data;
	return (prop->flag & PROP_NEVER_NULL) != 0;
}

static bool rna_Property_is_hidden_get(PointerRNA *ptr)
{
	PropertyRNA *prop = (PropertyRNA *)ptr->data;
	return (prop->flag & PROP_HIDDEN) != 0;
}

static bool rna_Property_is_skip_save_get(PointerRNA *ptr)
{
	PropertyRNA *prop = (PropertyRNA *)ptr->data;
	return (prop->flag & PROP_SKIP_SAVE) != 0;
}


static bool rna_Property_is_enum_flag_get(PointerRNA *ptr)
{
	PropertyRNA *prop = (PropertyRNA *)ptr->data;
	return (prop->flag & PROP_ENUM_FLAG) != 0;
}

static bool rna_Property_is_library_editable_flag_get(PointerRNA *ptr)
{
	PropertyRNA *prop = (PropertyRNA *)ptr->data;
	return (prop->flag & PROP_LIB_EXCEPTION) != 0;
}

static int rna_Property_tags_get(PointerRNA *ptr)
{
	return RNA_property_tags(ptr->data);
}

static const EnumPropertyItem *rna_Property_tags_itemf(
        bContext *UNUSED(C), PointerRNA *ptr,
        PropertyRNA *UNUSED(prop), bool *r_free)
{
	PropertyRNA *this_prop = (PropertyRNA *)ptr->data;
	const StructRNA *srna = RNA_property_pointer_type(ptr, this_prop);
	EnumPropertyItem *prop_tags;
	EnumPropertyItem tmp = {0, "", 0, "", ""};
	int totitem = 0;

	for (const EnumPropertyItem *struct_tags = RNA_struct_property_tag_defines(srna);
	     struct_tags != NULL && struct_tags->identifier != NULL;
	     struct_tags++)
	{
		memcpy(&tmp, struct_tags, sizeof(tmp));
		RNA_enum_item_add(&prop_tags, &totitem, &tmp);
	}
	RNA_enum_item_end(&prop_tags, &totitem);
	*r_free = true;

	return prop_tags;
}

static int rna_Property_array_length_get(PointerRNA *ptr)
{
	PropertyRNA *prop = (PropertyRNA *)ptr->data;
	rna_idproperty_check(&prop, ptr);
	return prop->totarraylength;
}

static void rna_Property_array_dimensions_get(PointerRNA *ptr, int dimensions[RNA_MAX_ARRAY_DIMENSION])
{
	PropertyRNA *prop = (PropertyRNA *)ptr->data;
	rna_idproperty_check(&prop, ptr);

	if (prop->arraydimension > 1) {
		for (int i = RNA_MAX_ARRAY_DIMENSION; i--; ) {
			dimensions[i] = (i >= prop->arraydimension) ? 0 : prop->arraylength[i];
		}
	}
	else {
		memset(dimensions, 0, sizeof(*dimensions) * RNA_MAX_ARRAY_DIMENSION);
		dimensions[0] = prop->totarraylength;
	}
}

static bool rna_Property_is_registered_get(PointerRNA *ptr)
{
	PropertyRNA *prop = (PropertyRNA *)ptr->data;
	return (prop->flag & PROP_REGISTER) != 0;
}

static bool rna_Property_is_registered_optional_get(PointerRNA *ptr)
{
	PropertyRNA *prop = (PropertyRNA *)ptr->data;
	return (prop->flag & PROP_REGISTER_OPTIONAL) != 0;
}

static bool rna_Property_is_runtime_get(PointerRNA *ptr)
{
	PropertyRNA *prop = (PropertyRNA *)ptr->data;
	return (prop->flag_internal & PROP_INTERN_RUNTIME) != 0;
}


static bool rna_BoolProperty_default_get(PointerRNA *ptr)
{
	PropertyRNA *prop = (PropertyRNA *)ptr->data;
	rna_idproperty_check(&prop, ptr);
	return ((BoolPropertyRNA *)prop)->defaultvalue;
}

static int rna_IntProperty_default_get(PointerRNA *ptr)
{
	PropertyRNA *prop = (PropertyRNA *)ptr->data;
	rna_idproperty_check(&prop, ptr);
	return ((IntPropertyRNA *)prop)->defaultvalue;
}
/* int/float/bool */
static int rna_NumberProperty_default_array_get_length(PointerRNA *ptr, int length[RNA_MAX_ARRAY_DIMENSION])
{
	PropertyRNA *prop = (PropertyRNA *)ptr->data;
	rna_idproperty_check(&prop, ptr);

	length[0] = prop->totarraylength;

	return length[0];
}
static bool rna_NumberProperty_is_array_get(PointerRNA *ptr)
{
	PropertyRNA *prop = (PropertyRNA *)ptr->data;

	return RNA_property_array_check(prop);
}

static void rna_IntProperty_default_array_get(PointerRNA *ptr, int *values)
{
	PropertyRNA *prop = (PropertyRNA *)ptr->data;
	rna_idproperty_check(&prop, ptr);
	if (prop->totarraylength > 0) {
		RNA_property_int_get_default_array(ptr, prop, values);
	}
}

static void rna_BoolProperty_default_array_get(PointerRNA *ptr, bool *values)
{
	PropertyRNA *prop = (PropertyRNA *)ptr->data;
	rna_idproperty_check(&prop, ptr);
	if (prop->totarraylength > 0) {
		RNA_property_boolean_get_default_array(ptr, prop, values);
	}
}

static void rna_FloatProperty_default_array_get(PointerRNA *ptr, float *values)
{
	PropertyRNA *prop = (PropertyRNA *)ptr->data;
	rna_idproperty_check(&prop, ptr);
	if (prop->totarraylength > 0) {
		RNA_property_float_get_default_array(ptr, prop, values);
	}
}

static int rna_IntProperty_hard_min_get(PointerRNA *ptr)
{
	PropertyRNA *prop = (PropertyRNA *)ptr->data;
	rna_idproperty_check(&prop, ptr);
	return ((IntPropertyRNA *)prop)->hardmin;
}

static int rna_IntProperty_hard_max_get(PointerRNA *ptr)
{
	PropertyRNA *prop = (PropertyRNA *)ptr->data;
	rna_idproperty_check(&prop, ptr);
	return ((IntPropertyRNA *)prop)->hardmax;
}

static int rna_IntProperty_soft_min_get(PointerRNA *ptr)
{
	PropertyRNA *prop = (PropertyRNA *)ptr->data;
	rna_idproperty_check(&prop, ptr);
	return ((IntPropertyRNA *)prop)->softmin;
}

static int rna_IntProperty_soft_max_get(PointerRNA *ptr)
{
	PropertyRNA *prop = (PropertyRNA *)ptr->data;
	rna_idproperty_check(&prop, ptr);
	return ((IntPropertyRNA *)prop)->softmax;
}

static int rna_IntProperty_step_get(PointerRNA *ptr)
{
	PropertyRNA *prop = (PropertyRNA *)ptr->data;
	rna_idproperty_check(&prop, ptr);
	return ((IntPropertyRNA *)prop)->step;
}

static float rna_FloatProperty_default_get(PointerRNA *ptr)
{
	PropertyRNA *prop = (PropertyRNA *)ptr->data;
	rna_idproperty_check(&prop, ptr);
	return ((FloatPropertyRNA *)prop)->defaultvalue;
}
static float rna_FloatProperty_hard_min_get(PointerRNA *ptr)
{
	PropertyRNA *prop = (PropertyRNA *)ptr->data;
	rna_idproperty_check(&prop, ptr);
	return ((FloatPropertyRNA *)prop)->hardmin;
}

static float rna_FloatProperty_hard_max_get(PointerRNA *ptr)
{
	PropertyRNA *prop = (PropertyRNA *)ptr->data;
	rna_idproperty_check(&prop, ptr);
	return ((FloatPropertyRNA *)prop)->hardmax;
}

static float rna_FloatProperty_soft_min_get(PointerRNA *ptr)
{
	PropertyRNA *prop = (PropertyRNA *)ptr->data;
	rna_idproperty_check(&prop, ptr);
	return ((FloatPropertyRNA *)prop)->softmin;
}

static float rna_FloatProperty_soft_max_get(PointerRNA *ptr)
{
	PropertyRNA *prop = (PropertyRNA *)ptr->data;
	rna_idproperty_check(&prop, ptr);
	return ((FloatPropertyRNA *)prop)->softmax;
}

static float rna_FloatProperty_step_get(PointerRNA *ptr)
{
	PropertyRNA *prop = (PropertyRNA *)ptr->data;
	rna_idproperty_check(&prop, ptr);
	return ((FloatPropertyRNA *)prop)->step;
}

static int rna_FloatProperty_precision_get(PointerRNA *ptr)
{
	PropertyRNA *prop = (PropertyRNA *)ptr->data;
	rna_idproperty_check(&prop, ptr);
	return ((FloatPropertyRNA *)prop)->precision;
}

static void rna_StringProperty_default_get(PointerRNA *ptr, char *value)
{
	PropertyRNA *prop = (PropertyRNA *)ptr->data;
	rna_idproperty_check(&prop, ptr);
	strcpy(value, ((StringPropertyRNA *)prop)->defaultvalue);
}
static int rna_StringProperty_default_length(PointerRNA *ptr)
{
	PropertyRNA *prop = (PropertyRNA *)ptr->data;
	rna_idproperty_check(&prop, ptr);
	return strlen(((StringPropertyRNA *)prop)->defaultvalue);
}

static int rna_StringProperty_max_length_get(PointerRNA *ptr)
{
	PropertyRNA *prop = (PropertyRNA *)ptr->data;
	rna_idproperty_check(&prop, ptr);
	return ((StringPropertyRNA *)prop)->maxlength;
}

static const EnumPropertyItem *rna_EnumProperty_default_itemf(
        bContext *C, PointerRNA *ptr,
        PropertyRNA *prop_parent, bool *r_free)
{
	PropertyRNA *prop = (PropertyRNA *)ptr->data;
	EnumPropertyRNA *eprop;

	rna_idproperty_check(&prop, ptr);
	eprop = (EnumPropertyRNA *)prop;

	/* incompatible default attributes */
	if ((prop_parent->flag & PROP_ENUM_FLAG) != (prop->flag & PROP_ENUM_FLAG)) {
		return DummyRNA_NULL_items;
	}

	if ((eprop->itemf == NULL) ||
	    (eprop->itemf == rna_EnumProperty_default_itemf) ||
	    (ptr->type == &RNA_EnumProperty) ||
	    (C == NULL))
	{
		if (eprop->item) {
			return eprop->item;
		}
	}

	return eprop->itemf(C, ptr, prop, r_free);
}

/* XXX - not sure this is needed? */
static int rna_EnumProperty_default_get(PointerRNA *ptr)
{
	PropertyRNA *prop = (PropertyRNA *)ptr->data;
	rna_idproperty_check(&prop, ptr);
	return ((EnumPropertyRNA *)prop)->defaultvalue;
}

static int rna_enum_check_separator(CollectionPropertyIterator *UNUSED(iter), void *data)
{
	EnumPropertyItem *item = (EnumPropertyItem *)data;

	return (item->identifier[0] == 0);
}

static void rna_EnumProperty_items_begin(CollectionPropertyIterator *iter, PointerRNA *ptr)
{
	PropertyRNA *prop = (PropertyRNA *)ptr->data;
	/* EnumPropertyRNA *eprop;  *//* UNUSED */
	const EnumPropertyItem *item = NULL;
	int totitem;
	bool free;

	rna_idproperty_check(&prop, ptr);
	/* eprop = (EnumPropertyRNA *)prop; */

	RNA_property_enum_items_ex(
	            NULL, ptr, prop, STREQ(iter->prop->identifier, "enum_items_static"), &item, &totitem, &free);
	rna_iterator_array_begin(iter, (void *)item, sizeof(EnumPropertyItem), totitem, free, rna_enum_check_separator);
}

static void rna_EnumPropertyItem_identifier_get(PointerRNA *ptr, char *value)
{
	strcpy(value, ((EnumPropertyItem *)ptr->data)->identifier);
}

static int rna_EnumPropertyItem_identifier_length(PointerRNA *ptr)
{
	return strlen(((EnumPropertyItem *)ptr->data)->identifier);
}

static void rna_EnumPropertyItem_name_get(PointerRNA *ptr, char *value)
{
	strcpy(value, ((EnumPropertyItem *)ptr->data)->name);
}

static int rna_EnumPropertyItem_name_length(PointerRNA *ptr)
{
	return strlen(((EnumPropertyItem *)ptr->data)->name);
}

static void rna_EnumPropertyItem_description_get(PointerRNA *ptr, char *value)
{
	EnumPropertyItem *eprop = (EnumPropertyItem *)ptr->data;

	if (eprop->description)
		strcpy(value, eprop->description);
	else
		value[0] = '\0';
}

static int rna_EnumPropertyItem_description_length(PointerRNA *ptr)
{
	EnumPropertyItem *eprop = (EnumPropertyItem *)ptr->data;

	if (eprop->description)
		return strlen(eprop->description);
	else
		return 0;
}

static int rna_EnumPropertyItem_value_get(PointerRNA *ptr)
{
	return ((EnumPropertyItem *)ptr->data)->value;
}

static int rna_EnumPropertyItem_icon_get(PointerRNA *ptr)
{
	return ((EnumPropertyItem *)ptr->data)->icon;
}

static PointerRNA rna_PointerProperty_fixed_type_get(PointerRNA *ptr)
{
	PropertyRNA *prop = (PropertyRNA *)ptr->data;
	rna_idproperty_check(&prop, ptr);
	return rna_pointer_inherit_refine(ptr, &RNA_Struct, ((PointerPropertyRNA *)prop)->type);
}

static PointerRNA rna_CollectionProperty_fixed_type_get(PointerRNA *ptr)
{
	PropertyRNA *prop = (PropertyRNA *)ptr->data;
	rna_idproperty_check(&prop, ptr);
	return rna_pointer_inherit_refine(ptr, &RNA_Struct, ((CollectionPropertyRNA *)prop)->item_type);
}

/* Function */

static void rna_Function_identifier_get(PointerRNA *ptr, char *value)
{
	strcpy(value, ((FunctionRNA *)ptr->data)->identifier);
}

static int rna_Function_identifier_length(PointerRNA *ptr)
{
	return strlen(((FunctionRNA *)ptr->data)->identifier);
}

static void rna_Function_description_get(PointerRNA *ptr, char *value)
{
	strcpy(value, ((FunctionRNA *)ptr->data)->description);
}

static int rna_Function_description_length(PointerRNA *ptr)
{
	return strlen(((FunctionRNA *)ptr->data)->description);
}

static void rna_Function_parameters_begin(CollectionPropertyIterator *iter, PointerRNA *ptr)
{
	rna_iterator_listbase_begin(iter, &((FunctionRNA *)ptr->data)->cont.properties, rna_property_builtin);
}

static bool rna_Function_registered_get(PointerRNA *ptr)
{
	FunctionRNA *func = (FunctionRNA *)ptr->data;
	return 0 != (func->flag & FUNC_REGISTER);
}

static bool rna_Function_registered_optional_get(PointerRNA *ptr)
{
	FunctionRNA *func = (FunctionRNA *)ptr->data;
	return 0 != (func->flag & (FUNC_REGISTER_OPTIONAL & ~FUNC_REGISTER));
}

static bool rna_Function_no_self_get(PointerRNA *ptr)
{
	FunctionRNA *func = (FunctionRNA *)ptr->data;
	return !(func->flag & FUNC_NO_SELF);
}

static int rna_Function_use_self_type_get(PointerRNA *ptr)
{
	FunctionRNA *func = (FunctionRNA *)ptr->data;
	return 0 != (func->flag & FUNC_USE_SELF_TYPE);
}

/* Blender RNA */

static int rna_struct_is_publc(CollectionPropertyIterator *UNUSED(iter), void *data)
{
	StructRNA *srna = data;

	return !(srna->flag & STRUCT_PUBLIC_NAMESPACE);
}


static void rna_BlenderRNA_structs_begin(CollectionPropertyIterator *iter, PointerRNA *ptr)
{
	BlenderRNA *brna = ptr->data;
	rna_iterator_listbase_begin(iter, &brna->structs, rna_struct_is_publc);
}

/* optional, for faster lookups */
static int rna_BlenderRNA_structs_length(PointerRNA *ptr)
{
	BlenderRNA *brna = ptr->data;
	BLI_assert(brna->structs_len == BLI_listbase_count(&brna->structs));
	return brna->structs_len;
}
static int rna_BlenderRNA_structs_lookup_int(PointerRNA *ptr, int index, PointerRNA *r_ptr)
{
	BlenderRNA *brna = ptr->data;
	StructRNA *srna = index < brna->structs_len ? BLI_findlink(&brna->structs, index) : NULL;
	if (srna != NULL) {
		RNA_pointer_create(NULL, &RNA_Struct, srna, r_ptr);
		return true;
	}
	else {
		return false;
	}
}
static int rna_BlenderRNA_structs_lookup_string(PointerRNA *ptr, const char *key, PointerRNA *r_ptr)
{
	BlenderRNA *brna = ptr->data;
	StructRNA *srna = BLI_ghash_lookup(brna->structs_map, (void *)key);
	if (srna != NULL) {
		RNA_pointer_create(NULL, &RNA_Struct, srna, r_ptr);
		return true;
	}

	return false;
}

/* Default override (and compare) callbacks. */

/* Ensures it makes sense to go inside the pointers to compare their content
 * (if they are IDs, or have different names or RNA type, then this would be meaningless). */
static bool rna_property_override_diff_propptr_validate_diffing(
        PointerRNA *propptr_a, PointerRNA *propptr_b, const bool no_prop_name,
        bool *r_is_id, bool *r_is_null, bool *r_is_type_diff,
        char **r_propname_a, char *propname_a_buff, size_t propname_a_buff_size,
        char **r_propname_b, char *propname_b_buff, size_t propname_b_buff_size)
{
	BLI_assert(propptr_a != NULL);

	bool is_valid_for_diffing = true;
	const bool do_force_name = !no_prop_name && r_propname_a != NULL;

	if (do_force_name) {
		BLI_assert(r_propname_a != NULL);
		BLI_assert(r_propname_b != NULL);
	}

	*r_is_id = *r_is_null = *r_is_type_diff = false;

	/* Beware, PointerRNA_NULL has no type and is considered a 'blank page'! */
	if (propptr_a->type == NULL) {
		if (propptr_b == NULL || propptr_b->type == NULL) {
			*r_is_null = true;
		}
		else {
			*r_is_id = RNA_struct_is_ID(propptr_b->type);
			*r_is_null = true;
			*r_is_type_diff = true;
		}
		is_valid_for_diffing = false;
	}
	else {
		*r_is_id = RNA_struct_is_ID(propptr_a->type);
		*r_is_null = *r_is_type_diff = (ELEM(NULL, propptr_b, propptr_b->type));
		is_valid_for_diffing = !(*r_is_id || *r_is_null);
	}

	if (propptr_b == NULL || propptr_a->type != propptr_b->type) {
		*r_is_type_diff = true;
		is_valid_for_diffing = false;
//		printf("%s: different pointer RNA types\n", rna_path ? rna_path : "<UNKNOWN>");
	}

	/* We do a generic quick first comparison checking for "name" and/or "type" properties.
	 * We assume that is any of those are false, then we are not handling the same data.
	 * This helps a lot in static override case, especially to detect inserted items in collections. */
	if (!no_prop_name && (is_valid_for_diffing || do_force_name)) {
		PropertyRNA *nameprop_a = RNA_struct_name_property(propptr_a->type);
		PropertyRNA *nameprop_b = (propptr_b != NULL) ? RNA_struct_name_property(propptr_b->type) : NULL;

		int propname_a_len = 0, propname_b_len = 0;
		char *propname_a = NULL;
		char *propname_b = NULL;
		char buff_a[4096];
		char buff_b[4096];
		if (nameprop_a != NULL) {
			if (r_propname_a == NULL && propname_a_buff == NULL) {
				propname_a_buff = buff_a;
				propname_a_buff_size = sizeof(buff_a);
			}

			propname_a = RNA_property_string_get_alloc(
			                 propptr_a, nameprop_a, propname_a_buff, propname_a_buff_size, &propname_a_len);
//			printf("propname_a = %s\n", propname_a ? propname_a : "<NONE>");

			if (r_propname_a != NULL) {
				*r_propname_a = propname_a;
			}
		}
//		else printf("item of type %s a has no name property!\n", propptr_a->type->name);
		if (nameprop_b != NULL) {
			if (r_propname_b == NULL && propname_b_buff == NULL) {
				propname_b_buff = buff_b;
				propname_b_buff_size = sizeof(buff_b);
			}

			propname_b = RNA_property_string_get_alloc(
			                 propptr_b, nameprop_b, propname_b_buff, propname_b_buff_size, &propname_b_len);

			if (r_propname_b != NULL) {
				*r_propname_b = propname_b;
			}
		}
		if (propname_a != NULL && propname_b != NULL) {
			if (propname_a_len != propname_b_len ||
			    propname_a[0] != propname_b[0] ||
			    !STREQ(propname_a, propname_b))
			{
				is_valid_for_diffing = false;
//				printf("%s: different names\n", rna_path ? rna_path : "<UNKNOWN>");
			}
		}
	}

	if (*r_is_id) {
		BLI_assert(propptr_a->data == propptr_a->id.data && propptr_b->data == propptr_b->id.data);
	}

	return is_valid_for_diffing;
}

/* Used for both Pointer and Collection properties. */
static int rna_property_override_diff_propptr(
        Main *bmain,
        PointerRNA *propptr_a, PointerRNA *propptr_b,
        eRNACompareMode mode, const bool no_ownership, const bool no_prop_name,
        IDOverrideStatic *override, const char *rna_path, const int flags, bool *r_override_changed)
{
	const bool do_create = override != NULL && (flags & RNA_OVERRIDE_COMPARE_CREATE) != 0 && rna_path != NULL;

	bool is_id = false;
	bool is_null = false;
	bool is_type_diff = false;
	/* If false, it means that the whole data itself is different, so no point in going inside of it at all! */
	bool is_valid_for_diffing = rna_property_override_diff_propptr_validate_diffing(
	                                propptr_a, propptr_b, no_prop_name, &is_id, &is_null, &is_type_diff,
	                                NULL, NULL, 0, NULL, NULL, 0);

	if (is_id) {
		BLI_assert(no_ownership);  /* For now, once we deal with nodetrees we'll want to get rid of that one. */
	}

	if (override) {
		if (no_ownership /* || is_id */ || is_null || is_type_diff || !is_valid_for_diffing) {
			/* In case this pointer prop does not own its data (or one is NULL), do not compare structs!
			 * This is a quite safe path to infinite loop, among other nasty issues.
			 * Instead, just compare pointers themselves. */
			const int comp = (propptr_a->data != propptr_b->data);

			if (do_create && comp != 0) {
				bool created = false;
				IDOverrideStaticProperty *op = BKE_override_static_property_get(override, rna_path, &created);

				if (op != NULL && created) {  /* If not yet overridden... */
					BKE_override_static_property_operation_get(
					            op, IDOVERRIDESTATIC_OP_REPLACE, NULL, NULL, -1, -1, true, NULL, NULL);
					if (r_override_changed) {
						*r_override_changed = created;
					}
				}
			}

			return comp;
		}
		else {
			eRNAOverrideMatchResult report_flags = 0;
			const bool match = RNA_struct_override_matches(
			                       bmain, propptr_a, propptr_b, rna_path, override, flags, &report_flags);
			if (r_override_changed && (report_flags & RNA_OVERRIDE_MATCH_RESULT_CREATED) != 0) {
				*r_override_changed = true;
			}
			return !match;
		}
	}
	else {
		/* We could also use is_diff_pointer, but then we potentially lose the gt/lt info -
		 * and don't think performances are critical here for now anyway... */
		return !RNA_struct_equals(bmain, propptr_a, propptr_b, mode);
	}
}



#define RNA_PROPERTY_GET_SINGLE(_typename, _ptr, _prop, _index) \
	(is_array ? RNA_property_##_typename##_get_index((_ptr), (_prop), (_index)) : \
	            RNA_property_##_typename##_get((_ptr), (_prop)))
#define RNA_PROPERTY_SET_SINGLE(_typename, _ptr, _prop, _index, _value) \
	(is_array ? RNA_property_##_typename##_set_index((_ptr), (_prop), (_index), (_value)) : \
	            RNA_property_##_typename##_set((_ptr), (_prop), (_value)))

int rna_property_override_diff_default(
        Main *bmain,
        PointerRNA *ptr_a, PointerRNA *ptr_b,
        PropertyRNA *prop_a, PropertyRNA *prop_b,
        const int len_a, const int len_b,
        const int mode,
        IDOverrideStatic *override, const char *rna_path,
        const int flags, bool *r_override_changed)
{
	BLI_assert(len_a == len_b);

	/* Note: at this point, we are sure that when len_a is zero, we are not handling an (empty) array. */

	const bool do_create = override != NULL && (flags & RNA_OVERRIDE_COMPARE_CREATE) != 0 && rna_path != NULL;

	switch (RNA_property_type(prop_a)) {
		case PROP_BOOLEAN:
		{
			if (len_a) {
				bool array_stack_a[RNA_STACK_ARRAY], array_stack_b[RNA_STACK_ARRAY];
				bool *array_a, *array_b;

				array_a = (len_a > RNA_STACK_ARRAY) ? MEM_mallocN(sizeof(bool) * len_a, "RNA equals") : array_stack_a;
				array_b = (len_b > RNA_STACK_ARRAY) ? MEM_mallocN(sizeof(bool) * len_b, "RNA equals") : array_stack_b;

				RNA_property_boolean_get_array(ptr_a, prop_a, array_a);
				RNA_property_boolean_get_array(ptr_b, prop_b, array_b);

				const int comp = memcmp(array_a, array_b, sizeof(bool) * len_a);

				if (do_create && comp != 0) {
					/* XXX TODO this will have to be refined to handle array items */
					bool created = false;
					IDOverrideStaticProperty *op = BKE_override_static_property_get(override, rna_path, &created);

					if (op != NULL && created) {
						BKE_override_static_property_operation_get(
						            op, IDOVERRIDESTATIC_OP_REPLACE, NULL, NULL, -1, -1, true, NULL, NULL);
						if (r_override_changed) {
							*r_override_changed = created;
						}
					}
					else {
						/* Already overridden prop, we'll have to check arrays items etc. */
					}
				}

				if (array_a != array_stack_a) MEM_freeN(array_a);
				if (array_b != array_stack_b) MEM_freeN(array_b);

				return comp;
			}
			else {
				const bool value_a = RNA_property_boolean_get(ptr_a, prop_a);
				const bool value_b = RNA_property_boolean_get(ptr_b, prop_b);
				const int comp = (value_a < value_b) ? -1 : (value_a > value_b) ? 1 : 0;

				if (do_create && comp != 0) {
					bool created = false;
					IDOverrideStaticProperty *op = BKE_override_static_property_get(override, rna_path, &created);

					if (op != NULL && created) {  /* If not yet overridden... */
						BKE_override_static_property_operation_get(
						            op, IDOVERRIDESTATIC_OP_REPLACE, NULL, NULL, -1, -1, true, NULL, NULL);
						if (r_override_changed) {
							*r_override_changed = created;
						}
					}
				}

				return comp;
			}
		}

		case PROP_INT:
		{
			if (len_a) {
				int array_stack_a[RNA_STACK_ARRAY], array_stack_b[RNA_STACK_ARRAY];
				int *array_a, *array_b;

				array_a = (len_a > RNA_STACK_ARRAY) ? MEM_mallocN(sizeof(int) * len_a, "RNA equals") : array_stack_a;
				array_b = (len_b > RNA_STACK_ARRAY) ? MEM_mallocN(sizeof(int) * len_b, "RNA equals") : array_stack_b;

				RNA_property_int_get_array(ptr_a, prop_a, array_a);
				RNA_property_int_get_array(ptr_b, prop_b, array_b);

				const int comp = memcmp(array_a, array_b, sizeof(int) * len_a);

				if (do_create && comp != 0) {
					/* XXX TODO this will have to be refined to handle array items */
					bool created = false;
					IDOverrideStaticProperty *op = BKE_override_static_property_get(override, rna_path, &created);

					if (op != NULL && created) {
						BKE_override_static_property_operation_get(
						            op, IDOVERRIDESTATIC_OP_REPLACE, NULL, NULL, -1, -1, true, NULL, NULL);
						if (r_override_changed) {
							*r_override_changed = created;
						}
					}
					else {
						/* Already overridden prop, we'll have to check arrays items etc. */
					}
				}

				if (array_a != array_stack_a) MEM_freeN(array_a);
				if (array_b != array_stack_b) MEM_freeN(array_b);

				return comp;
			}
			else {
				const int value_a = RNA_property_int_get(ptr_a, prop_a);
				const int value_b = RNA_property_int_get(ptr_b, prop_b);
				const int comp = (value_a < value_b) ? -1 : (value_a > value_b) ? 1 : 0;

				if (do_create && comp != 0) {
					bool created = false;
					IDOverrideStaticProperty *op = BKE_override_static_property_get(override, rna_path, &created);

					if (op != NULL && created) {  /* If not yet overridden... */
						BKE_override_static_property_operation_get(
						            op, IDOVERRIDESTATIC_OP_REPLACE, NULL, NULL, -1, -1, true, NULL, NULL);
						if (r_override_changed) {
							*r_override_changed = created;
						}
					}
				}

				return comp;
			}
		}

		case PROP_FLOAT:
		{
			if (len_a) {
				float array_stack_a[RNA_STACK_ARRAY], array_stack_b[RNA_STACK_ARRAY];
				float *array_a, *array_b;

				array_a = (len_a > RNA_STACK_ARRAY) ? MEM_mallocN(sizeof(float) * len_a, "RNA equals") : array_stack_a;
				array_b = (len_b > RNA_STACK_ARRAY) ? MEM_mallocN(sizeof(float) * len_b, "RNA equals") : array_stack_b;

				RNA_property_float_get_array(ptr_a, prop_a, array_a);
				RNA_property_float_get_array(ptr_b, prop_b, array_b);

				const int comp = memcmp(array_a, array_b, sizeof(float) * len_a);

				if (do_create && comp != 0) {
					/* XXX TODO this will have to be refined to handle array items */
					bool created = false;
					IDOverrideStaticProperty *op = BKE_override_static_property_get(override, rna_path, &created);

					if (op != NULL && created) {
						BKE_override_static_property_operation_get(
						            op, IDOVERRIDESTATIC_OP_REPLACE,
						            NULL, NULL, -1, -1, true, NULL, NULL);
						if (r_override_changed) {
							*r_override_changed = created;
						}
					}
					else {
						/* Already overridden prop, we'll have to check arrays items etc. */
					}
				}

				if (array_a != array_stack_a) MEM_freeN(array_a);
				if (array_b != array_stack_b) MEM_freeN(array_b);

				return comp;
			}
			else {
				const float value_a = RNA_property_float_get(ptr_a, prop_a);
				const float value_b = RNA_property_float_get(ptr_b, prop_b);
				const int comp = (value_a < value_b) ? -1 : (value_a > value_b) ? 1 : 0;

				if (do_create && comp != 0) {
					bool created = false;
					IDOverrideStaticProperty *op = BKE_override_static_property_get(override, rna_path, &created);

					if (op != NULL && created) {  /* If not yet overridden... */
						BKE_override_static_property_operation_get(
						            op, IDOVERRIDESTATIC_OP_REPLACE,
						            NULL, NULL, -1, -1, true, NULL, NULL);
						if (r_override_changed) {
							*r_override_changed = created;
						}
					}
				}

				return comp ;
			}
		}

		case PROP_ENUM:
		{
			const int value_a = RNA_property_enum_get(ptr_a, prop_a);
			const int value_b = RNA_property_enum_get(ptr_b, prop_b);
			const int comp = value_a != value_b;

			if (do_create && comp != 0) {
				bool created = false;
				IDOverrideStaticProperty *op = BKE_override_static_property_get(override, rna_path, &created);

				if (op != NULL && created) {  /* If not yet overridden... */
					BKE_override_static_property_operation_get(
					            op, IDOVERRIDESTATIC_OP_REPLACE, NULL, NULL, -1, -1, true, NULL, NULL);
					if (r_override_changed) {
						*r_override_changed = created;
					}
				}
			}

			return comp;
		}

		case PROP_STRING:
		{
			char fixed_a[4096], fixed_b[4096];
			int len_str_a, len_str_b;
			char *value_a = RNA_property_string_get_alloc(ptr_a, prop_a, fixed_a, sizeof(fixed_a), &len_str_a);
			char *value_b = RNA_property_string_get_alloc(ptr_b, prop_b, fixed_b, sizeof(fixed_b), &len_str_b);
			/* TODO we could do a check on length too, but then we would not have a 'real' string comparison...
			 * Maybe behind a eRNAOverrideMatch flag? */
//			const int comp = len_str_a < len_str_b ? -1 : len_str_a > len_str_b ? 1 : strcmp(value_a, value_b);
			const int comp = strcmp(value_a, value_b);

			if (do_create && comp != 0) {
				bool created = false;
				IDOverrideStaticProperty *op = BKE_override_static_property_get(override, rna_path, &created);

				if (op != NULL && created) {  /* If not yet overridden... */
					BKE_override_static_property_operation_get(
					            op, IDOVERRIDESTATIC_OP_REPLACE, NULL, NULL, -1, -1, true, NULL, NULL);
					if (r_override_changed) {
						*r_override_changed = created;
					}
				}
			}

			if (value_a != fixed_a) MEM_freeN(value_a);
			if (value_b != fixed_b) MEM_freeN(value_b);

			return comp;
		}

		case PROP_POINTER:
		{
			if (STREQ(RNA_property_identifier(prop_a), "rna_type")) {
				/* Dummy 'pass' answer, this is a meta-data and must be ignored... */
				return 0;
			}
			else {
				PointerRNA propptr_a = RNA_property_pointer_get(ptr_a, prop_a);
				PointerRNA propptr_b = RNA_property_pointer_get(ptr_b, prop_b);
				const bool no_ownership = (RNA_property_flag(prop_a) & PROP_PTR_NO_OWNERSHIP) != 0;
				const bool no_prop_name = (RNA_property_override_flag(prop_a) & PROPOVERRIDE_NO_PROP_NAME) != 0;
				return rna_property_override_diff_propptr(
				            bmain,
				            &propptr_a, &propptr_b, mode, no_ownership, no_prop_name,
				            override, rna_path, flags, r_override_changed);
			}
			break;
		}

		case PROP_COLLECTION:
		{
			/* Note: we assume we only insert in ptr_a (i.e. we can only get new items in ptr_a),
			 * and that we never remove anything. */
			const bool use_insertion = (RNA_property_override_flag(prop_a) & PROPOVERRIDE_STATIC_INSERTION) && do_create;
			const bool no_prop_name = (RNA_property_override_flag(prop_a) & PROPOVERRIDE_NO_PROP_NAME) != 0;
			bool equals = true;
			bool abort = false;
			bool is_first_insert = true;
			int idx_a = 0;
			int idx_b = 0;

#define RNA_PATH_BUFFSIZE 8192

			char extended_rna_path_buffer[RNA_PATH_BUFFSIZE];
			char *extended_rna_path = extended_rna_path_buffer;

#define RNA_PATH_PRINTF(_str, ...) \
			if (BLI_snprintf(extended_rna_path_buffer, RNA_PATH_BUFFSIZE, \
			                 (_str), __VA_ARGS__) >= RNA_PATH_BUFFSIZE - 1) \
			{ extended_rna_path = BLI_sprintfN((_str), __VA_ARGS__); }(void)0
#define RNA_PATH_FREE() \
			if (extended_rna_path != extended_rna_path_buffer) MEM_freeN(extended_rna_path)

			CollectionPropertyIterator iter_a, iter_b;
			RNA_property_collection_begin(ptr_a, prop_a, &iter_a);
			RNA_property_collection_begin(ptr_b, prop_b, &iter_b);

			char buff_a[4096];
			char buff_prev_a[4096] = {0};
			char buff_b[4096];
			char *propname_a = NULL;
			char *prev_propname_a = buff_prev_a;
			char *propname_b = NULL;

			for (; iter_a.valid && !abort; ) {
				bool is_valid_for_diffing;
				bool is_valid_for_insertion;
				do {
					bool is_id = false, is_null = false, is_type_diff = false;

					is_valid_for_insertion = use_insertion;

					/* If false, it means that the whole data itself is different, so no point in going inside of it at all! */
					if (iter_b.valid) {
						is_valid_for_diffing = rna_property_override_diff_propptr_validate_diffing(
						                           &iter_a.ptr, &iter_b.ptr, no_prop_name,
						                           &is_id, &is_null, &is_type_diff,
						                           &propname_a, buff_a, sizeof(buff_a),
						                           &propname_b, buff_b, sizeof(buff_b));
					}
					else {
						is_valid_for_diffing = false;
						if (is_valid_for_insertion) {
							/* We still need propname from 'a' item... */
							rna_property_override_diff_propptr_validate_diffing(
							            &iter_a.ptr, NULL, no_prop_name,
							            &is_id, &is_null, &is_type_diff,
							            &propname_a, buff_a, sizeof(buff_a),
							            &propname_b, buff_b, sizeof(buff_b));
						}
					}

					/* We do not support insertion of IDs for now, neither handle NULL pointers. */
					if (is_id || is_valid_for_diffing) {
						is_valid_for_insertion = false;
					}

#if 0
					if (rna_path) {
						printf("Checking %s, %s [%d] vs %s [%d]; is_id: %d, diffing: %d; "
						       "insert: %d (could be used: %d, do_create: %d)\n",
						       rna_path, propname_a ? propname_a : "", idx_a, propname_b ? propname_b : "", idx_b,
						       is_id, is_valid_for_diffing, is_valid_for_insertion,
						       (RNA_property_override_flag(prop_a) & PROPOVERRIDE_STATIC_INSERTION) != 0, do_create);
					}
#endif

					if (!(is_id || is_valid_for_diffing || is_valid_for_insertion)) {
						/* Differences we cannot handle, we can break here
						 * (we do not support replacing ID pointers in collections e.g.). */
						equals = false;
						abort = true;
						break;
					}

					/* There may be a propname defined in some cases, while no actual name set
					 * (e.g. happens with point cache), in that case too we want to fall back to index.
					 * Note that we do not need the RNA path for insertion operations. */
					if (is_id || is_valid_for_diffing) {
						if ((propname_a != NULL && propname_a[0] != '\0') &&
						    (propname_b != NULL && propname_b[0] != '\0'))
						{
							if (rna_path) {
								/* In case of name, either it is valid for diffing, and _a and _b are identical,
								 * or it is valid for insertion, and we need to use _a. */
								char esc_item_name[RNA_PATH_BUFFSIZE];
								BLI_strescape(esc_item_name, propname_a, RNA_PATH_BUFFSIZE);
								RNA_PATH_PRINTF("%s[\"%s\"]", rna_path, esc_item_name);
							}
						}
						else {  /* Based on index... */
							if (rna_path) {
								/* In case of indices, we need _a one for insertion, but _b ones for in-depth diffing.
								 * Insertion always happen once all 'replace' operations have been done,
								 * otherwise local and reference paths for those would have to be different! */
								RNA_PATH_PRINTF("%s[%d]", rna_path, is_valid_for_insertion ? idx_a : idx_b);
							}
						}
					}

					/* Collections do not support replacement of their data (since they do not support removing),
					 * only in *some* cases, insertion.
					 * We also assume then that _a data is the one where things are inserted. */
					if (is_valid_for_insertion && use_insertion) {
						bool created;
						IDOverrideStaticProperty *op = BKE_override_static_property_get(override, rna_path, &created);

						if (is_first_insert) {
							/* We need to clean up all possible existing insertion operations, otherwise we'd end up
							 * with a mess of ops everytime something changes. */
							for (IDOverrideStaticPropertyOperation *opop = op->operations.first;
							     opop != NULL;)
							{
								IDOverrideStaticPropertyOperation *opop_next = opop->next;
								if (ELEM(opop->operation,
								         IDOVERRIDESTATIC_OP_INSERT_AFTER, IDOVERRIDESTATIC_OP_INSERT_BEFORE))
								{
									BKE_override_static_property_operation_delete(op, opop);
								}
								opop = opop_next;
							}
							is_first_insert = false;
						}

						BKE_override_static_property_operation_get(
						            op, IDOVERRIDESTATIC_OP_INSERT_AFTER,
						            NULL, prev_propname_a, -1, idx_a - 1, true, NULL, NULL);
//						printf("%s: Adding insertion op override after '%s'/%d\n", rna_path, prev_propname_a, idx_a - 1);
					}
					else if (is_id || is_valid_for_diffing) {
						if (equals || do_create) {
							const bool no_ownership = (RNA_property_flag(prop_a) & PROP_PTR_NO_OWNERSHIP) != 0;
							const int eq = rna_property_override_diff_propptr(
							                   bmain,
							                   &iter_a.ptr, &iter_b.ptr, mode, no_ownership, no_prop_name,
							                   override, extended_rna_path, flags, r_override_changed);
							equals = equals && eq;
						}
					}

					if (prev_propname_a != buff_prev_a) {
						MEM_freeN(prev_propname_a);
						prev_propname_a = buff_prev_a;
					}
					prev_propname_a[0] = '\0';
					if (propname_a != NULL &&
					    BLI_strncpy_rlen(prev_propname_a, propname_a, sizeof(buff_prev_a)) >= sizeof(buff_prev_a) - 1)
					{
						prev_propname_a = BLI_strdup(propname_a);
					}
					if (propname_a != buff_a) {
						MEM_SAFE_FREE(propname_a);
						propname_a = buff_a;
					}
					propname_a[0] = '\0';
					if (propname_b != buff_b) {
						MEM_SAFE_FREE(propname_b);
						propname_b = buff_b;
					}
					propname_b[0] = '\0';
					RNA_PATH_FREE();

					if (!do_create && !equals) {
						abort = true;  /* Early out in case we do not want to loop over whole collection. */
						break;
					}

					if (!(use_insertion && !(is_id || is_valid_for_diffing))) {
						break;
					}

					if (iter_a.valid) {
						RNA_property_collection_next(&iter_a);
						idx_a++;
					}
				} while (iter_a.valid);

				if (iter_a.valid) {
					RNA_property_collection_next(&iter_a);
					idx_a++;
				}
				if (iter_b.valid) {
					RNA_property_collection_next(&iter_b);
					idx_b++;
				}

#undef RNA_PATH_BUFFSIZE
#undef RNA_PATH_PRINTF
#undef RNA_PATH_FREE
			}

			equals = equals && !(iter_a.valid || iter_b.valid) && !abort;  /* Not same number of items in both collections... */
			RNA_property_collection_end(&iter_a);
			RNA_property_collection_end(&iter_b);

			return (equals == false);
		}

		default:
			break;
	}

	return 0;
}

bool rna_property_override_store_default(
        Main *UNUSED(bmain),
        PointerRNA *ptr_local, PointerRNA *ptr_reference, PointerRNA *ptr_storage,
        PropertyRNA *prop_local, PropertyRNA *prop_reference, PropertyRNA *prop_storage,
        const int len_local, const int len_reference, const int len_storage,
        IDOverrideStaticPropertyOperation *opop)
{
	BLI_assert(len_local == len_reference && (!ptr_storage || len_local == len_storage));
	UNUSED_VARS_NDEBUG(len_reference, len_storage);

	bool changed = false;
	const bool is_array = len_local > 0;
	const int index = is_array ? opop->subitem_reference_index : 0;

	if (!ELEM(opop->operation, IDOVERRIDESTATIC_OP_ADD, IDOVERRIDESTATIC_OP_SUBTRACT, IDOVERRIDESTATIC_OP_MULTIPLY)) {
		return changed;
	}

	/* XXX TODO About range limits.
	 * Ideally, it would be great to get rid of RNA range in that specific case.
	 * However, this won't be that easy and will add yet another layer of complexity in generated code,
	 * not to mention that we could most likely *not* bypass custom setters anyway.
	 * So for now, if needed second operand value is not in valid range, we simply fall back
	 * to a mere REPLACE operation.
	 * Time will say whether this is acceptable limitation or not. */
	switch (RNA_property_type(prop_local)) {
		case PROP_BOOLEAN:
			/* TODO support boolean ops? Really doubt this would ever be useful though... */
			BLI_assert(0 && "Boolean properties support no override diff operation");
			break;
		case PROP_INT:
		{
			int prop_min, prop_max;
			RNA_property_int_range(ptr_local, prop_local, &prop_min, &prop_max);

			if (is_array && index == -1) {
				int array_stack_a[RNA_STACK_ARRAY], array_stack_b[RNA_STACK_ARRAY];
				int *array_a, *array_b;

				array_a = (len_local > RNA_STACK_ARRAY) ? MEM_mallocN(sizeof(*array_a) * len_local, __func__) : array_stack_a;
				RNA_property_int_get_array(ptr_reference, prop_reference, array_a);

				switch (opop->operation) {
					case IDOVERRIDESTATIC_OP_ADD:
					case IDOVERRIDESTATIC_OP_SUBTRACT:
					{
						const int fac = opop->operation == IDOVERRIDESTATIC_OP_ADD ? 1 : -1;
						const int other_op = opop->operation == IDOVERRIDESTATIC_OP_ADD ? IDOVERRIDESTATIC_OP_SUBTRACT : IDOVERRIDESTATIC_OP_ADD;
						bool do_set = true;
						array_b = (len_local > RNA_STACK_ARRAY) ? MEM_mallocN(sizeof(*array_b) * len_local, __func__) : array_stack_b;
						RNA_property_int_get_array(ptr_local, prop_local, array_b);
						for (int i = len_local; i--;) {
							array_b[i] = fac * (array_b[i] - array_a[i]);
							if (array_b[i] < prop_min || array_b[i] > prop_max) {
								opop->operation = other_op;
								for (int j = len_local; j--;) {
									array_b[j] = j >= i ? -array_b[j] : fac * (array_a[j] - array_b[j]);
									if (array_b[j] < prop_min || array_b[j] > prop_max) {
										/* We failed to  find a suitable diff op,
										 * fall back to plain REPLACE one. */
										opop->operation = IDOVERRIDESTATIC_OP_REPLACE;
										do_set = false;
										break;
									}
								}
								break;
							}
						}
						if (do_set) {
							changed = true;
							RNA_property_int_set_array(ptr_storage, prop_storage, array_b);
						}
						if (array_b != array_stack_b) MEM_freeN(array_b);
						break;
					}
					default:
						BLI_assert(0 && "Unsupported RNA override diff operation on integer");
						break;
				}

				if (array_a != array_stack_a) MEM_freeN(array_a);
			}
			else {
				const int value = RNA_PROPERTY_GET_SINGLE(int, ptr_reference, prop_reference, index);

				switch (opop->operation) {
					case IDOVERRIDESTATIC_OP_ADD:
					case IDOVERRIDESTATIC_OP_SUBTRACT:
					{
						const int fac = opop->operation == IDOVERRIDESTATIC_OP_ADD ? 1 : -1;
						const int other_op = opop->operation == IDOVERRIDESTATIC_OP_ADD ? IDOVERRIDESTATIC_OP_SUBTRACT : IDOVERRIDESTATIC_OP_ADD;
						int b = fac * (RNA_PROPERTY_GET_SINGLE(int, ptr_local, prop_local, index) - value);
						if (b < prop_min || b > prop_max) {
							opop->operation = other_op;
							b = -b;
							if (b < prop_min || b > prop_max) {
								opop->operation = IDOVERRIDESTATIC_OP_REPLACE;
								break;
							}
						}
						changed = true;
						RNA_PROPERTY_SET_SINGLE(int, ptr_storage, prop_storage, index, b);
						break;
					}
					default:
						BLI_assert(0 && "Unsupported RNA override diff operation on integer");
						break;
				}
			}
			break;
		}
		case PROP_FLOAT:
		{
			float prop_min, prop_max;
			RNA_property_float_range(ptr_local, prop_local, &prop_min, &prop_max);

			if (is_array && index == -1) {
				float array_stack_a[RNA_STACK_ARRAY], array_stack_b[RNA_STACK_ARRAY];
				float *array_a, *array_b;

				array_a = (len_local > RNA_STACK_ARRAY) ? MEM_mallocN(sizeof(*array_a) * len_local, __func__) : array_stack_a;

				RNA_property_float_get_array(ptr_reference, prop_reference, array_a);
				switch (opop->operation) {
					case IDOVERRIDESTATIC_OP_ADD:
					case IDOVERRIDESTATIC_OP_SUBTRACT:
					{
						const float fac = opop->operation == IDOVERRIDESTATIC_OP_ADD ? 1.0 : -1.0;
						const int other_op = opop->operation == IDOVERRIDESTATIC_OP_ADD ? IDOVERRIDESTATIC_OP_SUBTRACT : IDOVERRIDESTATIC_OP_ADD;
						bool do_set = true;
						array_b = (len_local > RNA_STACK_ARRAY) ? MEM_mallocN(sizeof(*array_b) * len_local, __func__) : array_stack_b;
						RNA_property_float_get_array(ptr_local, prop_local, array_b);
						for (int i = len_local; i--;) {
							array_b[i] = fac * (array_b[i] - array_a[i]);
							if (array_b[i] < prop_min || array_b[i] > prop_max) {
								opop->operation = other_op;
								for (int j = len_local; j--;) {
									array_b[j] = j >= i ? -array_b[j] : fac * (array_a[j] - array_b[j]);
									if (array_b[j] < prop_min || array_b[j] > prop_max) {
										/* We failed to  find a suitable diff op,
										 * fall back to plain REPLACE one. */
										opop->operation = IDOVERRIDESTATIC_OP_REPLACE;
										do_set = false;
										break;
									}
								}
								break;
							}
						}
						if (do_set) {
							changed = true;
							RNA_property_float_set_array(ptr_storage, prop_storage, array_b);
						}
						if (array_b != array_stack_b) MEM_freeN(array_b);
						break;
					}
					case IDOVERRIDESTATIC_OP_MULTIPLY:
					{
						bool do_set = true;
						array_b = (len_local > RNA_STACK_ARRAY) ? MEM_mallocN(sizeof(*array_b) * len_local, __func__) : array_stack_b;
						RNA_property_float_get_array(ptr_local, prop_local, array_b);
						for (int i = len_local; i--;) {
							array_b[i] = array_a[i] == 0.0f ? array_b[i] : array_b[i] / array_a[i];
							if (array_b[i] < prop_min || array_b[i] > prop_max) {
								opop->operation = IDOVERRIDESTATIC_OP_REPLACE;
								do_set = false;
								break;
							}
						}
						if (do_set) {
							changed = true;
							RNA_property_float_set_array(ptr_storage, prop_storage, array_b);
						}
						if (array_b != array_stack_b) MEM_freeN(array_b);
						break;
					}
					default:
						BLI_assert(0 && "Unsupported RNA override diff operation on float");
						break;
				}

				if (array_a != array_stack_a) MEM_freeN(array_a);
			}
			else {
				const float value = RNA_PROPERTY_GET_SINGLE(float, ptr_reference, prop_reference, index);

				switch (opop->operation) {
					case IDOVERRIDESTATIC_OP_ADD:
					case IDOVERRIDESTATIC_OP_SUBTRACT:
					{
						const float fac = opop->operation == IDOVERRIDESTATIC_OP_ADD ? 1.0f : -1.0f;
						const int other_op = opop->operation == IDOVERRIDESTATIC_OP_ADD ? IDOVERRIDESTATIC_OP_SUBTRACT : IDOVERRIDESTATIC_OP_ADD;
						float b = fac * (RNA_PROPERTY_GET_SINGLE(float, ptr_local, prop_local, index) - value);
						if (b < prop_min || b > prop_max) {
							opop->operation = other_op;
							b = -b;
							if (b < prop_min || b > prop_max) {
								opop->operation = IDOVERRIDESTATIC_OP_REPLACE;
								break;
							}
						}
						changed = true;
						RNA_PROPERTY_SET_SINGLE(float, ptr_storage, prop_storage, index, b);
						break;
					}
					case IDOVERRIDESTATIC_OP_MULTIPLY:
					{
						const float b = RNA_property_float_get_index(ptr_local, prop_local, index) / (value == 0.0f ?  1.0f : value);
						if (b < prop_min || b > prop_max) {
							opop->operation = IDOVERRIDESTATIC_OP_REPLACE;
							break;
						}
						changed = true;
						RNA_property_float_set_index(ptr_storage, prop_storage, index, b);
						break;
					}
					default:
						BLI_assert(0 && "Unsupported RNA override diff operation on float");
						break;
				}
			}
			return true;
		}
		case PROP_ENUM:
			/* TODO support add/sub, for bitflags? */
			BLI_assert(0 && "Enum properties support no override diff operation");
			break;
		case PROP_POINTER:
			BLI_assert(0 && "Pointer properties support no override diff operation");
			break;
		case PROP_STRING:
			BLI_assert(0 && "String properties support no override diff operation");
			break;
		case PROP_COLLECTION:
			/* XXX TODO support this of course... */
			BLI_assert(0 && "Collection properties support no override diff operation");
			break;
		default:
			break;
	}

	return changed;
}

bool rna_property_override_apply_default(
        Main *UNUSED(bmain),
        PointerRNA *ptr_dst, PointerRNA *ptr_src, PointerRNA *ptr_storage,
        PropertyRNA *prop_dst, PropertyRNA *prop_src, PropertyRNA *prop_storage,
        const int len_dst, const int len_src, const int len_storage,
        PointerRNA *UNUSED(ptr_item_dst), PointerRNA *UNUSED(ptr_item_src), PointerRNA *UNUSED(ptr_item_storage),
        IDOverrideStaticPropertyOperation *opop)
{
	BLI_assert(len_dst == len_src && (!ptr_storage || len_dst == len_storage));
	UNUSED_VARS_NDEBUG(len_src, len_storage);

	const bool is_array = len_dst > 0;
	const int index = is_array ? opop->subitem_reference_index : 0;
	const short override_op = opop->operation;

	switch (RNA_property_type(prop_dst)) {
		case PROP_BOOLEAN:
			if (is_array && index == -1) {
				bool array_stack_a[RNA_STACK_ARRAY];
				bool *array_a;

				array_a = (len_dst > RNA_STACK_ARRAY) ? MEM_mallocN(sizeof(*array_a) * len_dst, __func__) : array_stack_a;

				RNA_property_boolean_get_array(ptr_src, prop_src, array_a);

				switch (override_op) {
					case IDOVERRIDESTATIC_OP_REPLACE:
						RNA_property_boolean_set_array(ptr_dst, prop_dst, array_a);
						break;
					default:
						BLI_assert(0 && "Unsupported RNA override operation on boolean");
						return false;
				}

				if (array_a != array_stack_a) MEM_freeN(array_a);
			}
			else {
				const bool value = RNA_PROPERTY_GET_SINGLE(boolean, ptr_src, prop_src, index);

				switch (override_op) {
					case IDOVERRIDESTATIC_OP_REPLACE:
						RNA_PROPERTY_SET_SINGLE(boolean, ptr_dst, prop_dst, index, value);
						break;
					default:
						BLI_assert(0 && "Unsupported RNA override operation on boolean");
						return false;
				}
			}
			return true;
		case PROP_INT:
			if (is_array && index == -1) {
				int array_stack_a[RNA_STACK_ARRAY], array_stack_b[RNA_STACK_ARRAY];
				int *array_a, *array_b;

				array_a = (len_dst > RNA_STACK_ARRAY) ? MEM_mallocN(sizeof(*array_a) * len_dst, __func__) : array_stack_a;

				switch (override_op) {
					case IDOVERRIDESTATIC_OP_REPLACE:
						RNA_property_int_get_array(ptr_src, prop_src, array_a);
						RNA_property_int_set_array(ptr_dst, prop_dst, array_a);
						break;
					case IDOVERRIDESTATIC_OP_ADD:
					case IDOVERRIDESTATIC_OP_SUBTRACT:
						RNA_property_int_get_array(ptr_dst, prop_dst, array_a);
						array_b = (len_dst > RNA_STACK_ARRAY) ? MEM_mallocN(sizeof(*array_b) * len_dst, __func__) : array_stack_b;
						RNA_property_int_get_array(ptr_storage, prop_storage, array_b);
						if (override_op == IDOVERRIDESTATIC_OP_ADD) {
							for (int i = len_dst; i--;) array_a[i] += array_b[i];
						}
						else {
							for (int i = len_dst; i--;) array_a[i] -= array_b[i];
						}
						RNA_property_int_set_array(ptr_dst, prop_dst, array_a);
						if (array_b != array_stack_b) MEM_freeN(array_b);
						break;
					default:
						BLI_assert(0 && "Unsupported RNA override operation on integer");
						return false;
				}

				if (array_a != array_stack_a) MEM_freeN(array_a);
			}
			else {
				const int storage_value = ptr_storage ? RNA_PROPERTY_GET_SINGLE(int, ptr_storage, prop_storage, index) : 0;

				switch (override_op) {
					case IDOVERRIDESTATIC_OP_REPLACE:
						RNA_PROPERTY_SET_SINGLE(int, ptr_dst, prop_dst, index,
						                        RNA_PROPERTY_GET_SINGLE(int, ptr_src, prop_src, index));
						break;
					case IDOVERRIDESTATIC_OP_ADD:
						RNA_PROPERTY_SET_SINGLE(int, ptr_dst, prop_dst, index,
						                        RNA_PROPERTY_GET_SINGLE(int, ptr_dst, prop_dst, index) - storage_value);
						break;
					case IDOVERRIDESTATIC_OP_SUBTRACT:
						RNA_PROPERTY_SET_SINGLE(int, ptr_dst, prop_dst, index,
						                        RNA_PROPERTY_GET_SINGLE(int, ptr_dst, prop_dst, index) - storage_value);
						break;
					default:
						BLI_assert(0 && "Unsupported RNA override operation on integer");
						return false;
				}
			}
			return true;
		case PROP_FLOAT:
			if (is_array && index == -1) {
				float array_stack_a[RNA_STACK_ARRAY], array_stack_b[RNA_STACK_ARRAY];
				float *array_a, *array_b;

				array_a = (len_dst > RNA_STACK_ARRAY) ? MEM_mallocN(sizeof(*array_a) * len_dst, __func__) : array_stack_a;

				switch (override_op) {
					case IDOVERRIDESTATIC_OP_REPLACE:
						RNA_property_float_get_array(ptr_src, prop_src, array_a);
						RNA_property_float_set_array(ptr_dst, prop_dst, array_a);
						break;
					case IDOVERRIDESTATIC_OP_ADD:
					case IDOVERRIDESTATIC_OP_SUBTRACT:
					case IDOVERRIDESTATIC_OP_MULTIPLY:
						RNA_property_float_get_array(ptr_dst, prop_dst, array_a);
						array_b = (len_dst > RNA_STACK_ARRAY) ? MEM_mallocN(sizeof(*array_b) * len_dst, __func__) : array_stack_b;
						RNA_property_float_get_array(ptr_storage, prop_storage, array_b);
						if (override_op == IDOVERRIDESTATIC_OP_ADD) {
							for (int i = len_dst; i--;) array_a[i] += array_b[i];
						}
						else if (override_op == IDOVERRIDESTATIC_OP_SUBTRACT) {
							for (int i = len_dst; i--;) array_a[i] -= array_b[i];
						}
						else {
							for (int i = len_dst; i--;) array_a[i] *= array_b[i];
						}
						RNA_property_float_set_array(ptr_dst, prop_dst, array_a);
						if (array_b != array_stack_b) MEM_freeN(array_b);
						break;
					default:
						BLI_assert(0 && "Unsupported RNA override operation on float");
						return false;
				}

				if (array_a != array_stack_a) MEM_freeN(array_a);
			}
			else {
				const float storage_value = ptr_storage ? RNA_PROPERTY_GET_SINGLE(float, ptr_storage, prop_storage, index) : 0.0f;

				switch (override_op) {
					case IDOVERRIDESTATIC_OP_REPLACE:
						RNA_PROPERTY_SET_SINGLE(float, ptr_dst, prop_dst, index,
						                        RNA_PROPERTY_GET_SINGLE(float, ptr_src, prop_src, index));
						break;
					case IDOVERRIDESTATIC_OP_ADD:
						RNA_PROPERTY_SET_SINGLE(float, ptr_dst, prop_dst, index,
						                        RNA_PROPERTY_GET_SINGLE(float, ptr_dst, prop_dst, index) + storage_value);
						break;
					case IDOVERRIDESTATIC_OP_SUBTRACT:
						RNA_PROPERTY_SET_SINGLE(float, ptr_dst, prop_dst, index,
						                        RNA_PROPERTY_GET_SINGLE(float, ptr_dst, prop_dst, index) - storage_value);
						break;
					case IDOVERRIDESTATIC_OP_MULTIPLY:
						RNA_PROPERTY_SET_SINGLE(float, ptr_dst, prop_dst, index,
						                        RNA_PROPERTY_GET_SINGLE(float, ptr_dst, prop_dst, index) * storage_value);
						break;
					default:
						BLI_assert(0 && "Unsupported RNA override operation on float");
						return false;
				}
			}
			return true;
		case PROP_ENUM:
		{
			const int value = RNA_property_enum_get(ptr_src, prop_src);

			switch (override_op) {
				case IDOVERRIDESTATIC_OP_REPLACE:
					RNA_property_enum_set(ptr_dst, prop_dst, value);
					break;
				/* TODO support add/sub, for bitflags? */
				default:
					BLI_assert(0 && "Unsupported RNA override operation on enum");
					return false;
			}
			return true;
		}
		case PROP_POINTER:
		{
			PointerRNA value = RNA_property_pointer_get(ptr_src, prop_src);

			switch (override_op) {
				case IDOVERRIDESTATIC_OP_REPLACE:
					RNA_property_pointer_set(ptr_dst, prop_dst, value);
					break;
				default:
					BLI_assert(0 && "Unsupported RNA override operation on pointer");
					return false;
			}
			return true;
		}
		case PROP_STRING:
		{
			char buff[256];
			char *value = RNA_property_string_get_alloc(ptr_src, prop_src, buff, sizeof(buff), NULL);

			switch (override_op) {
				case IDOVERRIDESTATIC_OP_REPLACE:
					RNA_property_string_set(ptr_dst, prop_dst, value);
					break;
				default:
					BLI_assert(0 && "Unsupported RNA override operation on string");
					return false;
			}

			if (value != buff) MEM_freeN(value);
			return true;
		}
		case PROP_COLLECTION:
		{
			BLI_assert(!"You need to define a specific override apply callback for enums.");
			return false;
		}
		default:
			BLI_assert(0);
			return false;
	}

	return false;
}

#undef RNA_PROPERTY_GET_SINGLE
#undef RNA_PROPERTY_SET_SINGLE


#else

static void rna_def_struct(BlenderRNA *brna)
{
	StructRNA *srna;
	PropertyRNA *prop;

	srna = RNA_def_struct(brna, "Struct", NULL);
	RNA_def_struct_ui_text(srna, "Struct Definition", "RNA structure definition");
	RNA_def_struct_ui_icon(srna, ICON_RNA);

	prop = RNA_def_property(srna, "name", PROP_STRING, PROP_NONE);
	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
	RNA_def_property_string_funcs(prop, "rna_Struct_name_get", "rna_Struct_name_length", NULL);
	RNA_def_property_ui_text(prop, "Name", "Human readable name");

	prop = RNA_def_property(srna, "identifier", PROP_STRING, PROP_NONE);
	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
	RNA_def_property_string_funcs(prop, "rna_Struct_identifier_get", "rna_Struct_identifier_length", NULL);
	RNA_def_property_ui_text(prop, "Identifier", "Unique name used in the code and scripting");
	RNA_def_struct_name_property(srna, prop);

	prop = RNA_def_property(srna, "description", PROP_STRING, PROP_NONE);
	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
	RNA_def_property_string_funcs(prop, "rna_Struct_description_get", "rna_Struct_description_length", NULL);
	RNA_def_property_ui_text(prop, "Description", "Description of the Struct's purpose");

	prop = RNA_def_property(srna, "translation_context", PROP_STRING, PROP_NONE);
	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
	RNA_def_property_string_funcs(prop, "rna_Struct_translation_context_get",
	                              "rna_Struct_translation_context_length", NULL);
	RNA_def_property_ui_text(prop, "Translation Context", "Translation context of the struct's name");

	prop = RNA_def_property(srna, "base", PROP_POINTER, PROP_NONE);
	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
	RNA_def_property_struct_type(prop, "Struct");
	RNA_def_property_pointer_funcs(prop, "rna_Struct_base_get", NULL, NULL, NULL);
	RNA_def_property_ui_text(prop, "Base", "Struct definition this is derived from");

	prop = RNA_def_property(srna, "nested", PROP_POINTER, PROP_NONE);
	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
	RNA_def_property_struct_type(prop, "Struct");
	RNA_def_property_pointer_funcs(prop, "rna_Struct_nested_get", NULL, NULL, NULL);
	RNA_def_property_ui_text(prop, "Nested",
	                         "Struct in which this struct is always nested, and to which it logically belongs");

	prop = RNA_def_property(srna, "name_property", PROP_POINTER, PROP_NONE);
	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
	RNA_def_property_struct_type(prop, "StringProperty");
	RNA_def_property_pointer_funcs(prop, "rna_Struct_name_property_get", NULL, NULL, NULL);
	RNA_def_property_ui_text(prop, "Name Property", "Property that gives the name of the struct");

	prop = RNA_def_property(srna, "properties", PROP_COLLECTION, PROP_NONE);
	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
	RNA_def_property_struct_type(prop, "Property");
	RNA_def_property_collection_funcs(prop, "rna_Struct_properties_begin", "rna_Struct_properties_next",
	                                  "rna_iterator_listbase_end", "rna_Struct_properties_get",
	                                  NULL, NULL, NULL, NULL);
	RNA_def_property_ui_text(prop, "Properties", "Properties in the struct");

	prop = RNA_def_property(srna, "functions", PROP_COLLECTION, PROP_NONE);
	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
	RNA_def_property_struct_type(prop, "Function");
	RNA_def_property_collection_funcs(prop, "rna_Struct_functions_begin", "rna_Struct_functions_next",
	                                  "rna_iterator_listbase_end", "rna_Struct_functions_get",
	                                  NULL, NULL, NULL, NULL);
	RNA_def_property_ui_text(prop, "Functions", "");

	prop = RNA_def_property(srna, "property_tags", PROP_COLLECTION, PROP_NONE);
	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
	RNA_def_property_struct_type(prop, "EnumPropertyItem");
	RNA_def_property_collection_funcs(prop, "rna_Struct_property_tags_begin", "rna_iterator_array_next",
	                                  "rna_iterator_array_end", "rna_iterator_array_get",
	                                  NULL, NULL, NULL, NULL);
	RNA_def_property_ui_text(prop, "Property Tags", "Tags that properties can use to influence behavior");
}

static void rna_def_property(BlenderRNA *brna)
{
	StructRNA *srna;
	PropertyRNA *prop;
	static const EnumPropertyItem subtype_items[] = {
		{PROP_NONE, "NONE", 0, "None", ""},
		{PROP_FILEPATH, "FILE_PATH", 0, "File Path", ""},
		{PROP_DIRPATH, "DIR_PATH", 0, "Directory Path", ""},
		{PROP_PIXEL, "PIXEL", 0, "Pixel", ""},
		{PROP_UNSIGNED, "UNSIGNED", 0, "Unsigned Number", ""},
		{PROP_PERCENTAGE, "PERCENTAGE", 0, "Percentage", ""},
		{PROP_FACTOR, "FACTOR", 0, "Factor", ""},
		{PROP_ANGLE, "ANGLE", 0, "Angle", ""},
		{PROP_TIME, "TIME", 0, "Time", ""},
		{PROP_DISTANCE, "DISTANCE", 0, "Distance", ""},
		{PROP_COLOR, "COLOR", 0, "Color", ""},
		{PROP_TRANSLATION, "TRANSLATION", 0, "Translation", ""},
		{PROP_DIRECTION, "DIRECTION", 0, "Direction", ""},
		{PROP_MATRIX, "MATRIX", 0, "Matrix", ""},
		{PROP_EULER, "EULER", 0, "Euler", ""},
		{PROP_QUATERNION, "QUATERNION", 0, "Quaternion", ""},
		{PROP_XYZ, "XYZ", 0, "XYZ", ""},
		{PROP_COLOR_GAMMA, "COLOR_GAMMA", 0, "Gamma Corrected Color", ""},
		{PROP_COORDS, "COORDINATES", 0, "Vector Coordinates", ""},
		{PROP_LAYER, "LAYER", 0, "Layer", ""},
		{PROP_LAYER_MEMBER, "LAYER_MEMBERSHIP", 0, "Layer Membership", ""},
		{0, NULL, 0, NULL, NULL}
	};
	EnumPropertyItem dummy_prop_tags[] = {
		{0, NULL, 0, NULL, NULL}
	};

	srna = RNA_def_struct(brna, "Property", NULL);
	RNA_def_struct_ui_text(srna, "Property Definition", "RNA property definition");
	RNA_def_struct_refine_func(srna, "rna_Property_refine");
	RNA_def_struct_ui_icon(srna, ICON_RNA);

	prop = RNA_def_property(srna, "name", PROP_STRING, PROP_NONE);
	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
	RNA_def_property_string_funcs(prop, "rna_Property_name_get", "rna_Property_name_length", NULL);
	RNA_def_property_ui_text(prop, "Name", "Human readable name");

	prop = RNA_def_property(srna, "identifier", PROP_STRING, PROP_NONE);
	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
	RNA_def_property_string_funcs(prop, "rna_Property_identifier_get", "rna_Property_identifier_length", NULL);
	RNA_def_property_ui_text(prop, "Identifier", "Unique name used in the code and scripting");
	RNA_def_struct_name_property(srna, prop);

	prop = RNA_def_property(srna, "description", PROP_STRING, PROP_NONE);
	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
	RNA_def_property_string_funcs(prop, "rna_Property_description_get", "rna_Property_description_length", NULL);
	RNA_def_property_ui_text(prop, "Description", "Description of the property for tooltips");

	prop = RNA_def_property(srna, "translation_context", PROP_STRING, PROP_NONE);
	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
	RNA_def_property_string_funcs(prop, "rna_Property_translation_context_get",
	                              "rna_Property_translation_context_length", NULL);
	RNA_def_property_ui_text(prop, "Translation Context", "Translation context of the property's name");

	prop = RNA_def_property(srna, "type", PROP_ENUM, PROP_NONE);
	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
	RNA_def_property_enum_items(prop, rna_enum_property_type_items);
	RNA_def_property_enum_funcs(prop, "rna_Property_type_get", NULL, NULL);
	RNA_def_property_ui_text(prop, "Type", "Data type of the property");

	prop = RNA_def_property(srna, "subtype", PROP_ENUM, PROP_NONE);
	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
	RNA_def_property_enum_items(prop, subtype_items);
	RNA_def_property_enum_funcs(prop, "rna_Property_subtype_get", NULL, NULL);
	RNA_def_property_ui_text(prop, "Subtype", "Semantic interpretation of the property");

	prop = RNA_def_property(srna, "srna", PROP_POINTER, PROP_NONE);
	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
	RNA_def_property_struct_type(prop, "Struct");
	RNA_def_property_pointer_funcs(prop, "rna_Property_srna_get", NULL, NULL, NULL);
	RNA_def_property_ui_text(prop, "Base", "Struct definition used for properties assigned to this item");

	prop = RNA_def_property(srna, "unit", PROP_ENUM, PROP_NONE);
	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
	RNA_def_property_enum_items(prop, rna_enum_property_unit_items);
	RNA_def_property_enum_funcs(prop, "rna_Property_unit_get", NULL, NULL);
	RNA_def_property_ui_text(prop, "Unit", "Type of units for this property");

	prop = RNA_def_property(srna, "icon", PROP_ENUM, PROP_NONE);
	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
	RNA_def_property_enum_items(prop, rna_enum_icon_items);
	RNA_def_property_enum_funcs(prop, "rna_Property_icon_get", NULL, NULL);
	RNA_def_property_ui_text(prop, "Icon", "Icon of the item");

	prop = RNA_def_property(srna, "is_readonly", PROP_BOOLEAN, PROP_NONE);
	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
	RNA_def_property_boolean_funcs(prop, "rna_Property_readonly_get", NULL);
	RNA_def_property_ui_text(prop, "Read Only", "Property is editable through RNA");

	prop = RNA_def_property(srna, "is_animatable", PROP_BOOLEAN, PROP_NONE);
	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
	RNA_def_property_boolean_funcs(prop, "rna_Property_animatable_get", NULL);
	RNA_def_property_ui_text(prop, "Animatable", "Property is animatable through RNA");

	prop = RNA_def_property(srna, "is_overridable", PROP_BOOLEAN, PROP_NONE);
	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
	RNA_def_property_boolean_funcs(prop, "rna_Property_overridable_get", NULL);
	RNA_def_property_ui_text(prop, "Overridable", "Property is overridable through RNA");

	prop = RNA_def_property(srna, "is_required", PROP_BOOLEAN, PROP_NONE);
	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
	RNA_def_property_boolean_funcs(prop, "rna_Property_is_required_get", NULL);
	RNA_def_property_ui_text(prop, "Required", "False when this property is an optional argument in an RNA function");

	prop = RNA_def_property(srna, "is_argument_optional", PROP_BOOLEAN, PROP_NONE);
	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
	RNA_def_property_boolean_funcs(prop, "rna_Property_is_argument_optional_get", NULL);
	RNA_def_property_ui_text(prop, "Optional Argument",
	                         "True when the property is optional in a Python function implementing an RNA function");

	prop = RNA_def_property(srna, "is_never_none", PROP_BOOLEAN, PROP_NONE);
	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
	RNA_def_property_boolean_funcs(prop, "rna_Property_is_never_none_get", NULL);
	RNA_def_property_ui_text(prop, "Never None", "True when this value can't be set to None");

	prop = RNA_def_property(srna, "is_hidden", PROP_BOOLEAN, PROP_NONE);
	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
	RNA_def_property_boolean_funcs(prop, "rna_Property_is_hidden_get", NULL);
	RNA_def_property_ui_text(prop, "Hidden", "True when the property is hidden");

	prop = RNA_def_property(srna, "is_skip_save", PROP_BOOLEAN, PROP_NONE);
	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
	RNA_def_property_boolean_funcs(prop, "rna_Property_is_skip_save_get", NULL);
	RNA_def_property_ui_text(prop, "Skip Save", "True when the property is not saved in presets");

	prop = RNA_def_property(srna, "is_output", PROP_BOOLEAN, PROP_NONE);
	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
	RNA_def_property_boolean_funcs(prop, "rna_Property_use_output_get", NULL);
	RNA_def_property_ui_text(prop, "Return", "True when this property is an output value from an RNA function");

	prop = RNA_def_property(srna, "is_registered", PROP_BOOLEAN, PROP_NONE);
	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
	RNA_def_property_boolean_funcs(prop, "rna_Property_is_registered_get", NULL);
	RNA_def_property_ui_text(prop, "Registered", "Property is registered as part of type registration");

	prop = RNA_def_property(srna, "is_registered_optional", PROP_BOOLEAN, PROP_NONE);
	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
	RNA_def_property_boolean_funcs(prop, "rna_Property_is_registered_optional_get", NULL);
	RNA_def_property_ui_text(prop, "Registered Optionally",
	                         "Property is optionally registered as part of type registration");

	prop = RNA_def_property(srna, "is_runtime", PROP_BOOLEAN, PROP_NONE);
	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
	RNA_def_property_boolean_funcs(prop, "rna_Property_is_runtime_get", NULL);
	RNA_def_property_ui_text(prop, "Runtime", "Property has been dynamically created at runtime");

	prop = RNA_def_property(srna, "is_enum_flag", PROP_BOOLEAN, PROP_NONE);
	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
	RNA_def_property_boolean_funcs(prop, "rna_Property_is_enum_flag_get", NULL);
	RNA_def_property_ui_text(prop, "Enum Flag", "True when multiple enums ");

	prop = RNA_def_property(srna, "is_library_editable", PROP_BOOLEAN, PROP_NONE);
	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
	RNA_def_property_boolean_funcs(prop, "rna_Property_is_library_editable_flag_get", NULL);
	RNA_def_property_ui_text(prop, "Library Editable", "Property is editable from linked instances (changes not saved)");

	prop = RNA_def_property(srna, "tags", PROP_ENUM, PROP_NONE);
	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
	RNA_def_property_enum_items(prop, dummy_prop_tags);
	RNA_def_property_enum_funcs(prop, "rna_Property_tags_get", NULL, "rna_Property_tags_itemf");
	RNA_def_property_flag(prop, PROP_REGISTER_OPTIONAL | PROP_ENUM_FLAG);
	RNA_def_property_ui_text(prop, "Tags", "Subset of tags (defined in parent struct) that are set for this property");
}

static void rna_def_function(BlenderRNA *brna)
{
	StructRNA *srna;
	PropertyRNA *prop;

	srna = RNA_def_struct(brna, "Function", NULL);
	RNA_def_struct_ui_text(srna, "Function Definition", "RNA function definition");
	RNA_def_struct_ui_icon(srna, ICON_RNA);

	prop = RNA_def_property(srna, "identifier", PROP_STRING, PROP_NONE);
	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
	RNA_def_property_string_funcs(prop, "rna_Function_identifier_get", "rna_Function_identifier_length", NULL);
	RNA_def_property_ui_text(prop, "Identifier", "Unique name used in the code and scripting");
	RNA_def_struct_name_property(srna, prop);

	prop = RNA_def_property(srna, "description", PROP_STRING, PROP_NONE);
	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
	RNA_def_property_string_funcs(prop, "rna_Function_description_get", "rna_Function_description_length", NULL);
	RNA_def_property_ui_text(prop, "Description", "Description of the Function's purpose");

	prop = RNA_def_property(srna, "parameters", PROP_COLLECTION, PROP_NONE);
	/*RNA_def_property_clear_flag(prop, PROP_EDITABLE);*/
	RNA_def_property_struct_type(prop, "Property");
	RNA_def_property_collection_funcs(prop, "rna_Function_parameters_begin", "rna_iterator_listbase_next",
	                                  "rna_iterator_listbase_end", "rna_iterator_listbase_get",
	                                  NULL, NULL, NULL, NULL);
	RNA_def_property_ui_text(prop, "Parameters", "Parameters for the function");

	prop = RNA_def_property(srna, "is_registered", PROP_BOOLEAN, PROP_NONE);
	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
	RNA_def_property_boolean_funcs(prop, "rna_Function_registered_get", NULL);
	RNA_def_property_ui_text(prop, "Registered", "Function is registered as callback as part of type registration");

	prop = RNA_def_property(srna, "is_registered_optional", PROP_BOOLEAN, PROP_NONE);
	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
	RNA_def_property_boolean_funcs(prop, "rna_Function_registered_optional_get", NULL);
	RNA_def_property_ui_text(prop, "Registered Optionally",
	                         "Function is optionally registered as callback part of type registration");

	prop = RNA_def_property(srna, "use_self", PROP_BOOLEAN, PROP_NONE);
	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
	RNA_def_property_boolean_funcs(prop, "rna_Function_no_self_get", NULL);
	RNA_def_property_ui_text(prop, "No Self",
	                         "Function does not pass its self as an argument (becomes a static method in python)");

	prop = RNA_def_property(srna, "use_self_type", PROP_BOOLEAN, PROP_NONE);
	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
	RNA_def_property_boolean_funcs(prop, "rna_Function_use_self_type_get", NULL);
	RNA_def_property_ui_text(prop, "Use Self Type",
	                         "Function passes its self type as an argument (becomes a class method in python if use_self is false)");
}

static void rna_def_number_property(StructRNA *srna, PropertyType type)
{
	PropertyRNA *prop;

	prop = RNA_def_property(srna, "default", type, PROP_NONE);
	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
	RNA_def_property_ui_text(prop, "Default", "Default value for this number");

	switch (type) {
		case PROP_BOOLEAN:
			RNA_def_property_boolean_funcs(prop, "rna_BoolProperty_default_get", NULL);
			break;
		case PROP_INT:
			RNA_def_property_int_funcs(prop, "rna_IntProperty_default_get", NULL, NULL);
			break;
		case PROP_FLOAT:
			RNA_def_property_float_funcs(prop, "rna_FloatProperty_default_get", NULL, NULL);
			break;
		default:
			break;
	}


	prop = RNA_def_property(srna, "default_array", type, PROP_NONE);
	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
	RNA_def_property_array(prop, RNA_MAX_ARRAY_DIMENSION); /* no fixed default length, important its not 0 though */
	RNA_def_property_flag(prop, PROP_DYNAMIC);
	RNA_def_property_dynamic_array_funcs(prop, "rna_NumberProperty_default_array_get_length"); /* same for all types */

	switch (type) {
		case PROP_BOOLEAN:
			RNA_def_property_boolean_funcs(prop, "rna_BoolProperty_default_array_get", NULL);
			break;
		case PROP_INT:
			RNA_def_property_int_funcs(prop, "rna_IntProperty_default_array_get", NULL, NULL);
			break;
		case PROP_FLOAT:
			RNA_def_property_float_funcs(prop, "rna_FloatProperty_default_array_get", NULL, NULL);
			break;
		default:
			break;
	}
	RNA_def_property_ui_text(prop, "Default Array", "Default value for this array");


	prop = RNA_def_property(srna, "array_length", PROP_INT, PROP_UNSIGNED);
	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
	RNA_def_property_int_funcs(prop, "rna_Property_array_length_get", NULL, NULL);
	RNA_def_property_ui_text(prop, "Array Length", "Maximum length of the array, 0 means unlimited");

	prop = RNA_def_property(srna, "array_dimensions", PROP_INT, PROP_UNSIGNED);
	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
	RNA_def_property_array(prop, RNA_MAX_ARRAY_DIMENSION);
	RNA_def_property_int_funcs(prop, "rna_Property_array_dimensions_get", NULL, NULL);
	RNA_def_property_ui_text(prop, "Array Dimensions", "Length of each dimension of the array");

	prop = RNA_def_property(srna, "is_array", PROP_BOOLEAN, PROP_NONE);
	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
	RNA_def_property_boolean_funcs(prop, "rna_NumberProperty_is_array_get", NULL);
	RNA_def_property_ui_text(prop, "Is Array", "");

	if (type == PROP_BOOLEAN)
		return;

	prop = RNA_def_property(srna, "hard_min", type, PROP_NONE);
	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
	if (type == PROP_INT) RNA_def_property_int_funcs(prop, "rna_IntProperty_hard_min_get", NULL, NULL);
	else RNA_def_property_float_funcs(prop, "rna_FloatProperty_hard_min_get", NULL, NULL);
	RNA_def_property_ui_text(prop, "Hard Minimum", "Minimum value used by buttons");

	prop = RNA_def_property(srna, "hard_max", type, PROP_NONE);
	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
	if (type == PROP_INT) RNA_def_property_int_funcs(prop, "rna_IntProperty_hard_max_get", NULL, NULL);
	else RNA_def_property_float_funcs(prop, "rna_FloatProperty_hard_max_get", NULL, NULL);
	RNA_def_property_ui_text(prop, "Hard Maximum", "Maximum value used by buttons");

	prop = RNA_def_property(srna, "soft_min", type, PROP_NONE);
	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
	if (type == PROP_INT) RNA_def_property_int_funcs(prop, "rna_IntProperty_soft_min_get", NULL, NULL);
	else RNA_def_property_float_funcs(prop, "rna_FloatProperty_soft_min_get", NULL, NULL);
	RNA_def_property_ui_text(prop, "Soft Minimum", "Minimum value used by buttons");

	prop = RNA_def_property(srna, "soft_max", type, PROP_NONE);
	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
	if (type == PROP_INT) RNA_def_property_int_funcs(prop, "rna_IntProperty_soft_max_get", NULL, NULL);
	else RNA_def_property_float_funcs(prop, "rna_FloatProperty_soft_max_get", NULL, NULL);
	RNA_def_property_ui_text(prop, "Soft Maximum", "Maximum value used by buttons");

	prop = RNA_def_property(srna, "step", type, PROP_UNSIGNED);
	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
	if (type == PROP_INT) RNA_def_property_int_funcs(prop, "rna_IntProperty_step_get", NULL, NULL);
	else RNA_def_property_float_funcs(prop, "rna_FloatProperty_step_get", NULL, NULL);
	RNA_def_property_ui_text(prop, "Step", "Step size used by number buttons, for floats 1/100th of the step size");

	if (type == PROP_FLOAT) {
		prop = RNA_def_property(srna, "precision", PROP_INT, PROP_UNSIGNED);
		RNA_def_property_clear_flag(prop, PROP_EDITABLE);
		RNA_def_property_int_funcs(prop, "rna_FloatProperty_precision_get", NULL, NULL);
		RNA_def_property_ui_text(prop, "Precision", "Number of digits after the dot used by buttons");
	}
}

static void rna_def_string_property(StructRNA *srna)
{
	PropertyRNA *prop;

	prop = RNA_def_property(srna, "default", PROP_STRING, PROP_NONE);
	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
	RNA_def_property_string_funcs(prop, "rna_StringProperty_default_get", "rna_StringProperty_default_length", NULL);
	RNA_def_property_ui_text(prop, "Default", "string default value");

	prop = RNA_def_property(srna, "length_max", PROP_INT, PROP_UNSIGNED);
	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
	RNA_def_property_int_funcs(prop, "rna_StringProperty_max_length_get", NULL, NULL);
	RNA_def_property_ui_text(prop, "Maximum Length", "Maximum length of the string, 0 means unlimited");
}

static void rna_def_enum_property(BlenderRNA *brna, StructRNA *srna)
{
	PropertyRNA *prop;

	/* the itemf func is used instead, keep blender happy */
	static const EnumPropertyItem default_dummy_items[] = {
		{PROP_NONE, "DUMMY", 0, "Dummy", ""},
		{0, NULL, 0, NULL, NULL}
	};

	prop = RNA_def_property(srna, "default", PROP_ENUM, PROP_NONE);
	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
	RNA_def_property_enum_items(prop, default_dummy_items);
	RNA_def_property_enum_funcs(prop, "rna_EnumProperty_default_get", NULL, "rna_EnumProperty_default_itemf");
	RNA_def_property_ui_text(prop, "Default", "Default value for this enum");

	/* same 'default' but uses 'PROP_ENUM_FLAG' */
	prop = RNA_def_property(srna, "default_flag", PROP_ENUM, PROP_NONE);
	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
	RNA_def_property_flag(prop, PROP_ENUM_FLAG);
	RNA_def_property_enum_items(prop, default_dummy_items);
	RNA_def_property_enum_funcs(prop, "rna_EnumProperty_default_get", NULL, "rna_EnumProperty_default_itemf");
	RNA_def_property_ui_text(prop, "Default", "Default value for this enum");

	prop = RNA_def_property(srna, "enum_items", PROP_COLLECTION, PROP_NONE);
	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
	RNA_def_property_struct_type(prop, "EnumPropertyItem");
	RNA_def_property_collection_funcs(prop, "rna_EnumProperty_items_begin", "rna_iterator_array_next",
	                                  "rna_iterator_array_end", "rna_iterator_array_get", NULL, NULL, NULL, NULL);
	RNA_def_property_ui_text(prop, "Items", "Possible values for the property");

	prop = RNA_def_property(srna, "enum_items_static", PROP_COLLECTION, PROP_NONE);
	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
	RNA_def_property_struct_type(prop, "EnumPropertyItem");
	RNA_def_property_collection_funcs(prop, "rna_EnumProperty_items_begin", "rna_iterator_array_next",
	                                  "rna_iterator_array_end", "rna_iterator_array_get", NULL, NULL, NULL, NULL);
	RNA_def_property_ui_text(prop, "Static Items",
	                         "Possible values for the property (never calls optional dynamic generation of those)");

	srna = RNA_def_struct(brna, "EnumPropertyItem", NULL);
	RNA_def_struct_ui_text(srna, "Enum Item Definition", "Definition of a choice in an RNA enum property");
	RNA_def_struct_ui_icon(srna, ICON_RNA);

	prop = RNA_def_property(srna, "name", PROP_STRING, PROP_NONE);
	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
	RNA_def_property_string_funcs(prop, "rna_EnumPropertyItem_name_get", "rna_EnumPropertyItem_name_length", NULL);
	RNA_def_property_ui_text(prop, "Name", "Human readable name");

	prop = RNA_def_property(srna, "description", PROP_STRING, PROP_NONE);
	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
	RNA_def_property_string_funcs(prop, "rna_EnumPropertyItem_description_get",
	                              "rna_EnumPropertyItem_description_length", NULL);
	RNA_def_property_ui_text(prop, "Description", "Description of the item's purpose");

	prop = RNA_def_property(srna, "identifier", PROP_STRING, PROP_NONE);
	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
	RNA_def_property_string_funcs(prop, "rna_EnumPropertyItem_identifier_get",
	                              "rna_EnumPropertyItem_identifier_length", NULL);
	RNA_def_property_ui_text(prop, "Identifier", "Unique name used in the code and scripting");
	RNA_def_struct_name_property(srna, prop);

	prop = RNA_def_property(srna, "value", PROP_INT, PROP_UNSIGNED);
	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
	RNA_def_property_int_funcs(prop, "rna_EnumPropertyItem_value_get", NULL, NULL);
	RNA_def_property_ui_text(prop, "Value", "Value of the item");

	prop = RNA_def_property(srna, "icon", PROP_ENUM, PROP_NONE);
	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
	RNA_def_property_enum_items(prop, rna_enum_icon_items);
	RNA_def_property_enum_funcs(prop, "rna_EnumPropertyItem_icon_get", NULL, NULL);
	RNA_def_property_ui_text(prop, "Icon", "Icon of the item");
}

static void rna_def_pointer_property(StructRNA *srna, PropertyType type)
{
	PropertyRNA *prop;

	prop = RNA_def_property(srna, "fixed_type", PROP_POINTER, PROP_NONE);
	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
	RNA_def_property_struct_type(prop, "Struct");
	if (type == PROP_POINTER)
		RNA_def_property_pointer_funcs(prop, "rna_PointerProperty_fixed_type_get", NULL, NULL, NULL);
	else
		RNA_def_property_pointer_funcs(prop, "rna_CollectionProperty_fixed_type_get", NULL, NULL, NULL);
	RNA_def_property_ui_text(prop, "Pointer Type", "Fixed pointer type, empty if variable type");
}

void RNA_def_rna(BlenderRNA *brna)
{
	StructRNA *srna;
	PropertyRNA *prop;

	/* Struct*/
	rna_def_struct(brna);

	/* Property */
	rna_def_property(brna);

	/* BoolProperty */
	srna = RNA_def_struct(brna, "BoolProperty", "Property");
	RNA_def_struct_ui_text(srna, "Boolean Definition", "RNA boolean property definition");
	rna_def_number_property(srna, PROP_BOOLEAN);

	/* IntProperty */
	srna = RNA_def_struct(brna, "IntProperty", "Property");
	RNA_def_struct_ui_text(srna, "Int Definition", "RNA integer number property definition");
	rna_def_number_property(srna, PROP_INT);

	/* FloatProperty */
	srna = RNA_def_struct(brna, "FloatProperty", "Property");
	RNA_def_struct_ui_text(srna, "Float Definition", "RNA floating pointer number property definition");
	rna_def_number_property(srna, PROP_FLOAT);

	/* StringProperty */
	srna = RNA_def_struct(brna, "StringProperty", "Property");
	RNA_def_struct_ui_text(srna, "String Definition", "RNA text string property definition");
	rna_def_string_property(srna);

	/* EnumProperty */
	srna = RNA_def_struct(brna, "EnumProperty", "Property");
	RNA_def_struct_ui_text(srna, "Enum Definition",
	                       "RNA enumeration property definition, to choose from a number of predefined options");
	rna_def_enum_property(brna, srna);

	/* PointerProperty */
	srna = RNA_def_struct(brna, "PointerProperty", "Property");
	RNA_def_struct_ui_text(srna, "Pointer Definition", "RNA pointer property to point to another RNA struct");
	rna_def_pointer_property(srna, PROP_POINTER);

	/* CollectionProperty */
	srna = RNA_def_struct(brna, "CollectionProperty", "Property");
	RNA_def_struct_ui_text(srna, "Collection Definition",
	                       "RNA collection property to define lists, arrays and mappings");
	rna_def_pointer_property(srna, PROP_COLLECTION);

	/* Function */
	rna_def_function(brna);

	/* Blender RNA */
	srna = RNA_def_struct(brna, "BlenderRNA", NULL);
	RNA_def_struct_ui_text(srna, "Blender RNA", "Blender RNA structure definitions");
	RNA_def_struct_ui_icon(srna, ICON_RNA);

	prop = RNA_def_property(srna, "structs", PROP_COLLECTION, PROP_NONE);
	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
	RNA_def_property_struct_type(prop, "Struct");
	RNA_def_property_collection_funcs(prop, "rna_BlenderRNA_structs_begin", "rna_iterator_listbase_next",
	                                  "rna_iterator_listbase_end", "rna_iterator_listbase_get",
	                                  /* included for speed, can be removed */
#if 0
	                                  NULL, NULL, NULL, NULL);
#else
	                                  "rna_BlenderRNA_structs_length", "rna_BlenderRNA_structs_lookup_int",
	                                  "rna_BlenderRNA_structs_lookup_string", NULL);
#endif

	RNA_def_property_ui_text(prop, "Structs", "");
}

#endif
